Ryokan with an open-air bath in the room
Stays where you can soak in an onsen bath on your own room’s terrace.
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Stays across Japan
657 stays
Naraya
Kusatsu, Gunma
- Rooms with private open-air bath
- Reservable private bath
黄Sulfur Spring · Acidic (pH under 3) · Chloride spring · Free-flowing
Sources & details
- Tattoos OK if covered
- Analysis report on file
- Free-flowing (posted notice)
- Private bath checked Oct 2026
- Tattoo rule checked Oct 2026
Spring type: Acidic Sulfur-containing Aluminum Sulfate and Chloride Hot Spring (hydrogen sulfide type; Hypotonic Acidic high-temperature hot spring) / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 240.6 mg/kg
Source: in-room bath (kusatsu-naraya.co.jp) · private bath (kusatsu-naraya.co.jp) · tattoo rule (kusatsu-naraya.co.jp) · Checked May 31, 2026
Yoshiike Ryokan
Hakone, Kanagawa
- Rooms with private open-air bath
- Reservable private bath
塩Chloride Spring · Alkaline (pH 7.5+) · Free-flowing
pH 8.1See the spring data ›Sources & details
- Tattoos OK if covered
- Analysis report on file
- Free-flowing (posted notice)
- Tattoo rule checked Oct 2026
Spring type: Sodium-Calcium Chloride Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 77.8 mg/kg
Source: in-room bath (yoshiike.org) · private bath (yoshiike.org) · tattoo rule (yoshiike.org) · Checked May 30, 2026
Oyado Tamaki
Ikaho, Gunma
- Rooms with private open-air bath
- Reservable private bath
Property's note: Guests with tattoos are strictly prohibited from using the public bath. Please use rooms with open-air baths or private baths (additional charge) if you have tattoos. However, guests with small, single-point tattoos that can be completely covered by a sticker may use the public bath. Please ask the front desk for stickers.
塩Chloride Spring
pH 6.4See the spring data ›Sources & details
- Tattoos OK if covered
- Analysis report on file
- Tattoo rule checked Oct 2026
Spring type: Calcium-Sodium Sulfate, Bicarbonate and Chloride Hot Spring / Metasilicic acid 181 mg/kg
Source: in-room bath (travel.rakuten.co.jp) · private bath (oyado-tamaki.com) · tattoo rule (oyado-tamaki.com) · Checked May 31, 2026
Negiya Ryoufuukaku
Arima, Hyogo
- Rooms with private open-air bath
- Reservable private bath
Property's note: Guests with tattoos are generally asked to refrain from using the public baths. However, entry is permitted if a tattoo cover seal is used. Small, single-point tattoos are also allowed if covered.
塩Chloride Spring
pH 6.94See the spring data ›Sources & details
- Tattoos OK if covered
- Analysis report on file
- Tattoo rule checked Oct 2026
Spring type: Sodium Chloride Hot Spring / Recirculated or disinfected / No water added / Metasilicic acid 99.9 mg/kg
Source: in-room bath (jalan.net) · private bath (travel.rakuten.co.jp) · tattoo rule (travel.rakuten.co.jp) · Checked May 31, 2026
Nanakusa no Yu
Bessho & Kakeyu, Nagano
- Rooms with private open-air bath
- Reservable private bath
How to reserve the private bath黄Sulfur Spring · Alkaline (pH 7.5+) · Free-flowing
pH 8.8See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
- Private bath checked Oct 2026
Spring type: Alkaline Simple Sulfur Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 46.2 mg/kg
Source: in-room bath (nanakusanoyu.net) · private bath (nanakusanoyu.net) · Checked May 31, 2026
Kusatsu Now Resort Hotel
Kusatsu, Gunma
- Rooms with private open-air bath
- Reservable private bath
Property's note: Guests with tattoos are not permitted to use the public baths or swimming pool. Private baths (for a fee) are available. Tattoos are permitted if completely covered. Cover-up stickers were available for purchase.
酸Acidic Spring · Chloride spring
pH 1.75See the spring data ›Sources & details
- Tattoos OK if covered
- Analysis report on file
- Tattoo rule checked Oct 2026
Spring type: Acidic Hydrogen Sulfate and Chloride Hot Spring (Hypotonic Acidic high-temperature hot spring) / Metasilicic acid 528.3 mg/kg
Source: in-room bath (travel.yahoo.co.jp) · private bath (travel.rakuten.co.jp) · tattoo rule (kusatsu-now.jp) · Checked May 31, 2026
Nanten-en
Kawachinagano City, Osaka
- Rooms with private open-air bath
- Tattoos allowed
放Radium Spring
pH 6.88See the spring data ›Sources & details
- Analysis report on file
- Private bath checked Oct 2026
- Tattoo rule checked Oct 2026
Spring type: Simple Weakly radioactive Spring / Metasilicic acid 50.3 mg/kg
Source: in-room bath (e-oyu.com) · tattoo rule (e-oyu.com) · Checked May 31, 2026
Beppu Onsen Hotel Koraku
Beppu, Oita
- Rooms with private open-air bath
- Reservable private bath
How to reserve the private bath塩Chloride Spring · Free-flowing
pH 7.4See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
- Private bath checked Oct 2026
Spring type: Sodium-Magnesium-Calcium Bicarbonate and Chloride Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 249 mg/kg
Source: in-room bath (koraku.net) · private bath (travel.rakuten.co.jp) · Checked Jun 8, 2026
Yorozuya
Yudanaka & Shibu, Nagano
- Rooms with private open-air bath
- Reservable private bath
Property's note: Tattoos are permitted if they are palm-sized or smaller and covered with a tattoo cover-up seal.
No onsen analysis report on file yet
How to reserve the private bathSources & details
- Tattoos OK if covered
- Private bath checked Oct 2026
- Tattoo rule checked Oct 2026
Source: in-room bath (yudanaka-yoroduya.com) · private bath (yudanaka-yoroduya.com) · tattoo rule (yudanaka-yoroduya.com) · Checked May 31, 2026
Kanro no Mori
Niseko, Hokkaido
- Rooms with private open-air bath
- Reservable private bath
Property's note: Guests with tattoos are welcome. We strive to accommodate all guests, both Japanese and foreign, recognizing diverse cultural perspectives on tattoos, especially given our many international visitors.
No onsen analysis report on file yet
Sources & details
- Tattoos allowed
- Private bath checked Oct 2026
- Tattoo rule checked Oct 2026
Source: in-room bath (kanronomori.com) · private bath (kanronomori.com) · tattoo rule (kanronomori.com) · Checked May 31, 2026
Show the other 90 stays
Oedo Onsen Monogatari Terino Yu
Yubara, Okayama
- Rooms with private open-air bath
- Reservable private bath
Property's note: Guests with tattoos are not permitted to use the public bath. However, use is allowed if the tattoo is completely covered by a designated cover-up seal (available for a fee) provided by the facility.
No onsen analysis report on file yet
Sources & details
- Tattoos OK if covered
- Private bath checked Oct 2026
- Tattoo rule checked Oct 2026
Source: in-room bath (travel.rakuten.co.jp) · private bath (ooedoonsen.jp) · tattoo rule (ooedoonsen.jp) · Checked May 30, 2026
ETAVIA Yufuin Kinrinko
Yufuin, Oita
- Rooms with private open-air bath
- Reservable private bath
単Simple Spring · Alkaline (pH 7.5+) · Free-flowing
pH 8.4See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
Spring type: Simple Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 208 mg/kg
Source: in-room bath (etavia.jp) · private bath (etavia.jp) · Checked Jun 6, 2026
TOGEN Kurobe Unazuki Onsen
Unazuki, Toyama
- Rooms with private open-air bath
- Reservable private bath
単Simple Spring · Alkaline (pH 7.5+) · Free-flowing
pH 8.2See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
Spring type: Simple Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 26.9 mg/kg
Source: in-room bath (info-toyama.com) · private bath (travel.rakuten.co.jp) · Checked May 30, 2026
Kokoro Wo Naderu Seijaku Miyako
Gero, Gifu
- Rooms with private open-air bath
- Reservable private bath
単Simple Spring · Alkaline (pH 7.5+)
pH 8.9See the spring data ›Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Alkaline Simple Hot Spring / Metasilicic acid 57.3 mg/kg
Source: in-room bath (miyako21.co.jp) · private bath (miyako21.co.jp) · Checked May 30, 2026
Hotel Tenbo
Ikaho, Gunma
- Rooms with private open-air bath
- Reservable private bath
塩Chloride Spring
pH 6.4See the spring data ›Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Calcium-Sodium Sulfate, Bicarbonate and Chloride Hot Spring / Metasilicic acid 181 mg/kg
Source: in-room bath (tenbo.com) · private bath (tenbo.com) · Checked May 31, 2026
La Vista Kusatsu Hills
Kusatsu, Gunma
- Rooms with private open-air bath
- Reservable private bath
酸Acidic Spring · Chloride spring · Free-flowing
pH 2.4See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
Spring type: Acidic Aluminum-containing Chloride Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 166 mg/kg
Source: in-room bath (dormy-hotels.com) · private bath (g-onsen.hatenablog.com) · Checked May 30, 2026
Libmax Resort Kusatsu Onsen
Kusatsu, Gunma
- Rooms with private open-air bath
酸Acidic Spring · Chloride spring · Free-flowing
pH 1.75See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
- Private bath checked Oct 2026
Spring type: Acidic Hydrogen Sulfate and Chloride Hot Spring (Hypotonic Acidic high-temperature hot spring) / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 528.3 mg/kg
Unazuki Onsen Enraku
Unazuki, Toyama
- Rooms with private open-air bath
単Simple Spring · Alkaline (pH 7.5+) · Free-flowing
pH 8.2See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
- Private bath checked Oct 2026
Spring type: Simple Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 26.9 mg/kg
Source: in-room bath (enraku.com) · Checked May 30, 2026
Unazuki Onsen Sun Yanagitei
Unazuki, Toyama
- Rooms with private open-air bath
単Simple Spring · Alkaline (pH 7.5+) · Free-flowing
pH 7.83See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
- Private bath checked Oct 2026
Spring type: Simple Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 151 mg/kg
Source: in-room bath (travel.rakuten.co.jp) · Checked May 30, 2026
Gero Onsen Kaiseki-yado Suihouen
Gero, Gifu
- Rooms with private open-air bath
- Reservable private bath
単Simple Spring · Alkaline (pH 7.5+)
pH 8.9See the spring data ›Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Alkaline Simple Hot Spring / Metasilicic acid 57.3 mg/kg
Source: in-room bath (jtb.co.jp) · private bath (jtb.co.jp) · Checked Oct 14, 2026
Gero Onsen Kawakamiya Hanasuitei
Gero, Gifu
- Rooms with private open-air bath
- Reservable private bath
単Simple Spring · Alkaline (pH 7.5+)
pH 8.9See the spring data ›Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Alkaline Simple Hot Spring / Recirculated or disinfected / No water added / Metasilicic acid 57.3 mg/kg
Source: in-room bath (kawakamiyakasuitei.jp) · private bath (kawakamiyakasuitei.jp) · Checked Oct 14, 2026
Kawaichi-ya Ryokan
Nozawa Onsen, Nagano
- Rooms with private open-air bath
黄Sulfur Spring · Alkaline (pH 7.5+) · Free-flowing
pH 8.96See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
- Private bath checked Oct 2026
Spring type: Sulfur-containing Sodium-Calcium Sulfate Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 104.1 mg/kg
Source: in-room bath (kawaichiya.jp) · Checked May 31, 2026
Meto Onsen Hotel
Ashoro, Ashoro District, Hokkaido
- Rooms with private open-air bath
- Reservable private bath
単Simple Spring · Alkaline (pH 7.5+) · Free-flowing
pH 9.5See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
Spring type: Alkaline Simple Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 82.5 mg/kg
Source: in-room bath (travel.yahoo.co.jp) · private bath (metouonsen.jp) · Checked May 31, 2026
Kai Beppu
Beppu, Oita
- Rooms with private open-air bath
- Tattoos allowed
Property's note: Hoshino Resorts does not restrict guests with tattoos. However, the property may refuse use of the onsen and shared baths if it judges that other guests could feel intimidated (official website).
塩Chloride Spring
pH 7.4See the spring data ›Sources & details
- Analysis report on file
- Tattoo rule checked Oct 2026
Spring type: Sodium Chloride and Bicarbonate Spring / Metasilicic acid 211 mg/kg
Source: in-room bath (rurubu.jp) · tattoo rule (hoshinoresorts.com) · Checked Jun 15, 2026
Kannon Onsen
Shimoda, Shizuoka
- Rooms with private open-air bath
- Reservable private bath
単Simple Spring · Alkaline (pH 7.5+) · Free-flowing
pH 9.4See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
Spring type: Alkaline Simple Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 143.9 mg/kg
Source: in-room bath (kannon-onsen.com) · private bath (shizuokayado.jp) · Checked May 31, 2026
Kiritani Hakoneso
Hakone, Kanagawa
- Rooms with private open-air bath
- Reservable private bath
酸Acidic Spring · Chloride spring · Free-flowing
pH 2.1See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
Spring type: Acidic Calcium Sulfate and Chloride Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 157 mg/kg
Source: in-room bath (kiritani-hakoneso.com) · private bath (travel.rakuten.co.jp) · Checked May 31, 2026
Tonosawa Onsen Motoyu Kansuiro
Hakone, Kanagawa
- Rooms with private open-air bath
- Reservable private bath
単Simple Spring · Alkaline (pH 7.5+) · Free-flowing
pH 8.8See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
Spring type: Alkaline Simple Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 51.5 mg/kg
Source: in-room bath (vertexaisearch.cloud.google.com) · private bath (vertexaisearch.cloud.google.com) · Checked May 30, 2026
Motoyu Ryusenkan
Arima, Hyogo
- Rooms with private open-air bath
- Reservable private bath
How to reserve the private bath鉄Iron Spring · Chloride spring
Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Iron(II,III)-containing Sodium Chloride Hot Spring (Hypertonic Neutral low-temperature hot spring) / Metasilicic acid 89.2 mg/kg
Source: in-room bath (ryuusenkaku.jp) · private bath (ryuusenkaku.jp) · Checked May 31, 2026
Oyado Nurukawa Onsen
Yufuin, Oita
- Rooms with private open-air bath
- Reservable private bath
単Simple Spring · Alkaline (pH 7.5+) · Free-flowing
pH 8.3See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
Spring type: Simple Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 188 mg/kg
Source: in-room bath (onsen.nifty.com) · private bath (onsen.nifty.com) · Checked Jun 6, 2026
Kurokawa Onsen Nanjo En
Kurokawa, Kumamoto
- Rooms with private open-air bath
- Reservable private bath
単Simple Spring
pH 3.7See the spring data ›Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Simple Hot Spring / Metasilicic acid 169.9 mg/kg
Source: in-room bath (travel.rakuten.co.jp) · private bath (travel.rakuten.co.jp)
Amagase Onsen Sansou Tensui
Hita & Amagase, Oita
- Rooms with private open-air bath
- Reservable private bath
単Simple Spring
pH 7.3See the spring data ›Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Simple Hot Spring / Free-flowing, with heating, added water or filtering / Water added / Metasilicic acid 157 mg/kg
Source: in-room bath (tensui.net) · private bath (tensui.net) · Checked May 31, 2026
Shima Yamaguchi-kan
Shima Onsen, Gunma
- Rooms with private open-air bath
塩Chloride Spring · Alkaline (pH 7.5+) · Free-flowing
pH 7.6See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
- Private bath checked Oct 2026
Spring type: Sodium-Calcium Chloride and Sulfate Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 105 mg/kg
Source: in-room bath (yamaguchikan.co.jp) · Checked May 31, 2026
Shinwaen
Beppu, Oita
- Rooms with private open-air bath
塩Chloride Spring · Alkaline (pH 7.5+) · Free-flowing
pH 7.9See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
- Private bath checked Oct 2026
Spring type: Sodium-Calcium Chloride and Sulfate Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 220 mg/kg
Source: in-room bath (kannawaen.jp) · Checked May 31, 2026
Hakone Yumoto Onsen Hakone Suimeiso
Hakone, Kanagawa
- Rooms with private open-air bath
- Reservable private bath
単Simple Spring · Alkaline (pH 7.5+) · Free-flowing
pH 8.5See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
Spring type: Alkaline Simple Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 70.6 mg/kg
Source: in-room bath (hakone.or.jp) · private bath (hakone.or.jp) · Checked May 30, 2026
Hoshino Resorts Aomoriya
Rokunohe, Aomori
- Rooms with private open-air bath
- Tattoos allowed
Property's note: Hoshino Resorts does not restrict guests with tattoos. However, the property may refuse use of the onsen and shared baths if it judges that other guests could feel intimidated (official website).
単Simple Spring · Alkaline (pH 7.5+)
pH 9.1See the spring data ›Sources & details
- Analysis report on file
- Tattoo rule checked Oct 2026
Spring type: Alkaline Simple Hot Spring / Recirculated or disinfected / No water added / Metasilicic acid 181.6 mg/kg
Source: in-room bath (ameblo.jp) · tattoo rule (hoshinoresorts.com) · Checked May 30, 2026
Seifukan
Osakikamijima Town, Hiroshima
- Rooms with private open-air bath
- Reservable private bath
放Radium Spring · Chloride spring
Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Weakly radioactive Sodium-Calcium Chloride Cold Mineral Spring / Metasilicic acid 90 mg/kg
Source: in-room bath (hotel-seifukan.co.jp) · private bath (hotel-seifukan.co.jp) · Checked May 30, 2026
Nishimura-ya Hotel Shogetsutei
Kinosaki, Hyogo
- Rooms with private open-air bath
- Reservable private bath
塩Chloride Spring
pH 7.3See the spring data ›Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Sodium-Calcium Chloride Spring / Metasilicic acid 29.4 mg/kg
Source: in-room bath (nishimuraya.ne.jp) · private bath (nishimuraya.ne.jp) · Checked May 31, 2026
Aone Onsen Yumoto Wasurezu Kaku
Miyagi Zao (Togatta & Aone), Miyagi
- Rooms with private open-air bath
- Reservable private bath
単Simple Spring · Free-flowing
pH 7.4See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
Spring type: Simple Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 65.4 mg/kg
Source: in-room bath (travel.rakuten.co.jp) · private bath (travel.rakuten.co.jp) · Checked May 30, 2026
Sengokuhara Onsen Senkyoro
Hakone, Kanagawa
- Rooms with private open-air bath
- Reservable private bath
酸Acidic Spring · Chloride spring · Free-flowing
pH 2.1See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
Spring type: Acidic Calcium Sulfate and Chloride Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 157 mg/kg
Source: in-room bath (jalan.net) · private bath (travel.rakuten.co.jp) · Checked May 31, 2026
Sengakukan
Gero, Gifu
- Rooms with private open-air bath
- Reservable private bath
炭Carbonated Spring
pH 5.7See the spring data ›Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Simple Cold Mineral Spring / Recirculated or disinfected / No water added / Metasilicic acid 34 mg/kg
Source: in-room bath (sengakukan.co.jp) · private bath (sengakukan.co.jp) · Checked Oct 15, 2026
Kuramazae Onsen Masago-kan
Kakegawa, Shizuoka
- Rooms with private open-air bath
- Reservable private bath
黄Sulfur Spring · Alkaline (pH 7.5+)
pH 9.5See the spring data ›Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Simple Sulfur Cold Mineral Spring (Hypotonic Alkaline cold mineral spring) / Metasilicic acid 22 mg/kg
Source: in-room bath (travel.rakuten.co.jp) · private bath (travel.rakuten.co.jp)
Nukumori no Yado Furukawa
Jozankei, Hokkaido
- Rooms with private open-air bath
- Reservable private bath
塩Chloride Spring · Free-flowing
pH 7.2See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
Spring type: Sodium Chloride Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 114.4 mg/kg
Source: in-room bath (yado-furu.com) · private bath (yado-furu.com) · Checked May 30, 2026
Tenchi no Yado Oku no Hosomichi
Arima, Hyogo
- Rooms with private open-air bath
- Reservable private bath
塩Chloride Spring
pH 6.94See the spring data ›Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Sodium Chloride Hot Spring / Metasilicic acid 99.9 mg/kg
Source: in-room bath (arima-okunohosomichi.com) · private bath (arima-okunohosomichi.com) · Checked May 31, 2026
Noboribetsu Onsen Manseikaku
Noboribetsu, Hokkaido
- Rooms with private open-air bath
- Reservable private bath
鉄Iron Spring · Sulfur spring · Acidic (pH under 3)
pH 2.3See the spring data ›Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Acidic Sulfur-containing Iron(II,III) Simple Hot Spring (hydrogen sulfide type) / Free-flowing, with heating, added water or filtering / Water added / Metasilicic acid 76.6 mg/kg
Source: in-room bath (travel.yahoo.co.jp) · private bath (noboribetsu-manseikaku.jp) · Checked May 30, 2026
Hakone Yumoto Onsen Hakone Kamon
Hakone, Kanagawa
- Rooms with private open-air bath
- Reservable private bath
塩Chloride Spring · Alkaline (pH 7.5+) · Free-flowing
pH 8.3See the spring data ›PRIncludes affiliate linksView rates on Trip.comSources & details
- Analysis report on file
- Free-flowing (posted notice)
Spring type: Sodium-Calcium Chloride and Sulfate Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 62.6 mg/kg
Source: in-room bath (hakone-kamon.jp) · private bath (hakone-kamon.jp) · Checked May 30, 2026
Shiki no Yuzashiki Musashino Bekkan
Hakone, Kanagawa
- Rooms with private open-air bath
- Reservable private bath
塩Chloride Spring · Alkaline (pH 7.5+) · Free-flowing
pH 8.1See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
Spring type: Sodium Chloride Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 107 mg/kg
Source: in-room bath (ozmall.co.jp) · private bath (jalan.net) · Checked May 31, 2026
Beppu Kannawa Kamioka Onsen Hozanso
Beppu, Oita
- Rooms with private open-air bath
- Reservable private bath
黄Sulfur Spring · Alkaline (pH 7.5+)
Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Sulfur-containing Sodium Bicarbonate and Sulfate Hot Spring / Metasilicic acid 339 mg/kg
Source: in-room bath (travel.rakuten.co.jp) · private bath (travel.rakuten.co.jp) · Checked Oct 10, 2026
Nozawa Onsen Hotel
Nozawa Onsen, Nagano
- Rooms with private open-air bath
- Reservable private bath
硫Sulfate Spring
Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Sodium Sulfate Spring / Metasilicic acid 168 mg/kg
Source: in-room bath (nozawaonsen-h.jp) · private bath (nozawaonsen-h.jp) · Checked May 31, 2026
Arima Onsen Hotel Hanakoyado
Arima, Hyogo
- Rooms with private open-air bath
- Reservable private bath
塩Chloride Spring · Free-flowing
pH 6.94See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
Spring type: Sodium Chloride Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 99.9 mg/kg
Source: in-room bath (hanakoyado.com) · private bath (travel.rakuten.co.jp) · Checked Jun 14, 2026
Yufuin Onsen Yufu no Go Saigakukan
Yufuin, Oita
- Rooms with private open-air bath
- Reservable private bath
単Simple Spring · Alkaline (pH 7.5+) · Free-flowing
pH 8.2See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
Spring type: Simple Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 95.8 mg/kg
Source: in-room bath (jalan.net) · private bath (travel.rakuten.co.jp) · Checked May 30, 2026
Yufuin Onsen Tabi no Yado Poppoan
Yufuin, Oita
- Rooms with private open-air bath
- Reservable private bath
単Simple Spring · Alkaline (pH 7.5+) · Free-flowing
pH 8.6See the spring data ›Sources & details
- Analysis report on file
- Free-flowing (posted notice)
Spring type: Alkaline Simple Hot Spring / Free-flowing from the source, with no added water, heating or recirculation / Metasilicic acid 166 mg/kg
Source: in-room bath (poppoan.com) · private bath (jalan.net) · Checked Jun 9, 2026
Sakura Kyuan Bekutei Rin
Hakone, Kanagawa
- Rooms with private open-air bath
- Reservable private bath
塩Chloride Spring · Alkaline (pH 7.5+)
pH 8.5See the spring data ›Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Sodium Chloride Hot Spring / Metasilicic acid 148 mg/kg
Source: in-room bath (travel.rakuten.co.jp) · private bath (travel.rakuten.co.jp) · Checked Oct 23, 2026
ANA Crown Plaza Resort Appi Kogen Onsen
Iwate
- Rooms with private open-air bath
- Reservable private bath
Property's note: Guests with tattoos are generally not permitted to use the baths. However, bathing is allowed if tattoos can be covered with a tattoo cover-up sticker.
No onsen analysis report on file yet
Sources & details
- Tattoos OK if covered
- Tattoo rule checked Oct 2026
Source: in-room bath (ikyu.com) · private bath (appi.co.jp) · tattoo rule (ozmall.co.jp) · Checked May 30, 2026
Gora Hanaougi Madoka no Mori
Hakone, Kanagawa
- Rooms with private open-air bath
- Tattoos allowed
No onsen analysis report on file yet
Sources & details
- Private bath checked Nov 2026
- Tattoo rule checked Nov 2026
Source: in-room bath (madokanomori.gorahanaougi.com) · tattoo rule (madokanomori.gorahanaougi.com)
Gensen Yu no Yado Matsunoi
Minakami, Gunma
- Rooms with private open-air bath
- Reservable private bath
No onsen analysis report on file yet
Sources & details
- Tattoos OK if covered
- Tattoo rule checked Oct 2026
Source: in-room bath (5star-ryokan.com) · private bath (spa.or.jp) · tattoo rule (ooedoonsen.jp) · Checked May 30, 2026
Taketori-tei Maruyama
Arima, Hyogo
- Rooms with private open-air bath
- Reservable private bath
No onsen analysis report on file yet
Sources & details
- Tattoos allowed
- Tattoo rule checked Oct 2026
Source: in-room bath (taketoritei.com) · private bath (travel.rakuten.co.jp) · tattoo rule (taketoritei.com) · Checked May 31, 2026
Fuji View Hotel
Lake Kawaguchiko, Yamanashi
- Rooms with private open-air bath
- Tattoos OK if covered
No onsen analysis report on file yet
Sources & details
- Private bath checked Nov 2026
- Tattoo rule checked Nov 2026
Source: in-room bath (fujiview.jp) · tattoo rule (fujiview.jp)
Murasugi Onsen Kadoya Ryokan
Niigata
- Rooms with private open-air bath
- Reservable private bath
放Radium Spring · Alkaline (pH 7.5+)
pH 8.6See the spring data ›PRIncludes affiliate linksView rates on Rakuten TravelSources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Simple Weakly radioactive Hot Spring / Metasilicic acid 26.2 mg/kg
Source: in-room bath (kadoyasan.com) · private bath (kadoyasan.com) · Checked Oct 2, 2026
AMBER Yufuin
Yufuin, Oita
- Rooms with private open-air bath
- Reservable private bath
How to reserve the private bath塩Chloride Spring · Alkaline (pH 7.5+)
pH 8.9See the spring data ›Sources & details
- Analysis report on file
Spring type: Sodium Chloride and Bicarbonate Hot Spring / Metasilicic acid 360 mg/kg
Source: in-room bath (jalan.net) · private bath (jalan.net) · Checked Jun 11, 2026
ANA InterContinental Beppu Resort & Spa
Beppu, Oita
- Rooms with private open-air bath
- Reservable private bath
塩Chloride Spring
pH 6.5See the spring data ›Sources & details
- Analysis report on file
Spring type: Sodium Chloride Hot Spring / Recirculated or disinfected / Water added / Metasilicic acid 242 mg/kg
Source: in-room bath (travel.rakuten.co.jp) · private bath (anaicbeppu.com) · Checked May 31, 2026
Misora Yufuin
Yufuin, Oita
- Rooms with private open-air bath
- Reservable private bath
単Simple Spring · Alkaline (pH 7.5+)
pH 8.5See the spring data ›Sources & details
- Analysis report on file
Spring type: Alkaline Simple Hot Spring / Metasilicic acid 130 mg/kg
Source: in-room bath (stayyufuin.com) · private bath (stayyufuin.com) · Checked Jun 8, 2026
Spa Terrace Shisui
Arima, Hyogo
- Rooms with private open-air bath
- Reservable private bath
鉄Iron Spring · Chloride spring
pH 6.6See the spring data ›Sources & details
- Analysis report on file
Spring type: Iron-containing Sodium Chloride strong saline Hot Spring / Free-flowing, with heating, added water or filtering / No water added / Metasilicic acid 121.4 mg/kg
Source: in-room bath (arima-shisui.com) · private bath (arima-shisui.com) · Checked May 31, 2026
Villa Reine Suite 02
Beppu, Oita
- Rooms with private open-air bath
- Reservable private bath
単Simple Spring · Alkaline (pH 7.5+)
pH 7.7See the spring data ›Sources & details
- Analysis report on file
Spring type: Simple Hot Spring / Metasilicic acid 221 mg/kg
Source: in-room bath (yufuin-bnb.com) · private bath (hotel.travel.rakuten.co.jp) · Checked Jun 9, 2026
Oyado Hakusan
Kinosaki, Hyogo
- Rooms with private open-air bath
- Reservable private bath
塩Chloride Spring
pH 7.3See the spring data ›Sources & details
- Analysis report on file
Spring type: Sodium-Calcium Chloride Spring / Metasilicic acid 29.4 mg/kg
Source: in-room bath (onsen.nifty.com) · private bath (onsen.nifty.com) · Checked May 30, 2026
Shotokuji Onsen Hatsuhana
Hakone, Kanagawa
- Rooms with private open-air bath
単Simple Spring · Alkaline (pH 7.5+)
pH 9.5See the spring data ›Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Alkaline Simple Hot Spring (Hypotonic Alkaline low-temperature hot spring) / Recirculated or disinfected / No water added / Metasilicic acid 126.7 mg/kg
Source: in-room bath (travel.rakuten.co.jp) · Checked May 30, 2026
Biratori Onsen Yukara
Biratori, Hokkaido
- Rooms with private open-air bath
- Reservable private bath
塩Chloride Spring · Alkaline (pH 7.5+)
pH 8.3See the spring data ›Sources & details
- Analysis report on file
Spring type: Sodium-Calcium Chloride strong saline Cold Mineral Spring / Recirculated or disinfected / Water added / Metasilicic acid 12.1 mg/kg
Source: in-room bath (travel.yahoo.co.jp) · private bath (biratori-onsen.com) · Checked May 31, 2026
Libmax Resort Kaga Yamashiro
Kaga Onsen, Ishikawa
- Rooms with private open-air bath
硫Sulfate Spring · Alkaline (pH 7.5+)
pH 8.3See the spring data ›Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Calcium-Sodium Sulfate Hot Spring / Recirculated or disinfected / Water added / Metasilicic acid 39.7 mg/kg
Source: in-room bath (livemax-resort.com) · Checked Oct 31, 2026
Libmax Resort Amagi Yugashima
Amagi-Yugashima, Shizuoka
- Rooms with private open-air bath
単Simple Spring · Alkaline (pH 7.5+)
pH 8.17See the spring data ›Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Simple Hot Spring / Metasilicic acid 22.4 mg/kg
Regina Resort Hakone Sengokuhara
Hakone, Kanagawa
- Rooms with private open-air bath
酸Acidic Spring · Chloride spring
pH 2.1See the spring data ›Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Acidic Calcium Sulfate and Chloride Hot Spring / Metasilicic acid 157 mg/kg
Source: in-room bath (travel.rakuten.co.jp) · Checked Oct 21, 2026
Ashikari
Yugawara, Kanagawa
- Rooms with private open-air bath
- Reservable private bath
How to reserve the private bath塩Chloride Spring · Alkaline (pH 7.5+)
pH 8.3See the spring data ›Sources & details
- Analysis report on file
Spring type: Sodium-Calcium Chloride and Sulfate Hot Spring / Recirculated or disinfected / No water added / Metasilicic acid 97.1 mg/kg
Source: in-room bath (ashikari.com) · private bath (onsen.tabibun.net) · Checked May 31, 2026
Ikaho Onsen Hotel Kimura
Ikaho, Gunma
- Rooms with private open-air bath
Onsen analysis report on file
Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Neutral Cold Mineral Spring / Recirculated or disinfected / Water added / Metasilicic acid 66.1 mg/kg
Source: in-room bath (travel.rakuten.co.jp) · Checked Oct 27, 2026
Ikaho Onsen Hotel Kogoro
Ikaho, Gunma
- Rooms with private open-air bath
塩Chloride Spring
pH 6.4See the spring data ›Sources & details
- Analysis report on file
- Private bath checked Oct 2026
Spring type: Calcium-Sodium Sulfate, Bicarbonate and Chloride Hot Spring / Metasilicic acid 181 mg/kg
Source: in-room bath (travel.rakuten.co.jp) · Checked Oct 27, 2026
Kintaro Onsen Kofu-kaku
Toyama
- Rooms with private open-air bath
- Reservable private bath
How to reserve the private bath黄Sulfur Spring · Chloride spring
Sources & details
- Analysis report on file
Spring type: Sulfur-containing Sodium-Calcium Chloride Spring (hydrogen sulfide type) / Metasilicic acid 98.2 mg/kg
Source: in-room bath (ryokan.or.jp) · private bath (ryokan.or.jp) · Checked May 31, 2026
Unzen Obama Onsen Juraku
Unzen & Obama, Nagasaki
- Rooms with private open-air bath
- Reservable private bath
No onsen analysis report on file yet
Sources & details
- Private bath checked Oct 2026
Source: in-room bath (juraku-obama.com) · private bath (juraku-obama.com) · Checked May 30, 2026
Senri no Kaze
Chiba
- Rooms with private open-air bath
- Reservable private bath
No onsen analysis report on file yet
How to reserve the private bathSources & details
- Private bath checked Oct 2026
Source: in-room bath (senrinokaze.jp) · private bath (senrinokaze.jp) · Checked May 31, 2026
Hinokami Shou
Shimane
- Rooms with private open-air bath
- Reservable private bath
No onsen analysis report on file yet
PRIncludes affiliate linksView rates on Rakuten TravelSources & details
- Private bath checked Oct 2026
Source: in-room bath (hinokami.jp) · private bath (hinokami.jp) · Checked May 31, 2026
Kurashiki Yuka Onsen Hotel Yamato-bana
Kurashiki, Okayama
- Rooms with private open-air bath
放Radium Spring
pH 6.7See the spring data ›Sources & details
- Analysis report on file
Spring type: Simple Weakly radioactive Cold Mineral Spring / Metasilicic acid 50.2 mg/kg
Source: in-room bath (ikyu.com) · Checked May 31, 2026
Ogoto Onsen Biwa Midorsui Tei
Shiga
- Rooms with private open-air bath
No onsen analysis report on file yet
Sources & details
- Private bath checked Oct 2026
Livemax Resort Aki Miyahama Onsen
Hiroshima
- Rooms with private open-air bath
No onsen analysis report on file yet
Sources & details
- Private bath checked Oct 2026
Unzen Onsen Unzen Iwaki Ryokan
Unzen & Obama, Nagasaki
- Rooms with private open-air bath
No onsen analysis report on file yet
Sources & details
- Private bath checked Oct 2026
Miyajima Grand Hotel Arimoto
Hiroshima
- Rooms with private open-air bath
No onsen analysis report on file yet
Sources & details
- Private bath checked Oct 2026
Miyajima Bessou Hatago Sakura
Hiroshima
- Rooms with private open-air bath
No onsen analysis report on file yet
Sources & details
- Private bath checked Oct 2026
Harahara Onsen Harahara no Mai
Fukuoka
- Rooms with private open-air bath
No onsen analysis report on file yet
Sources & details
- Private bath checked Oct 2026
Obama Onsen Orange Bay
Unzen & Obama, Nagasaki
- Rooms with private open-air bath
No onsen analysis report on file yet
Sources & details
- Private bath checked Oct 2026
Shouyou Spa Resort
Fukuoka
- Rooms with private open-air bath
- Reservable private bath
No onsen analysis report on file yet
Sources & details
Source: in-room bath (terihaspa.jp) · private bath (crossroadfukuoka.jp) · Checked May 30, 2026
Sugatani Onsen
Shiga
- Rooms with private open-air bath
No onsen analysis report on file yet
Sources & details
- Private bath checked Oct 2026
Source: in-room bath (sugatani.co.jp) · Checked May 31, 2026
Senno Mori Bessou Tsukuyomi no Za
Mie
- Rooms with private open-air bath
No onsen analysis report on file yet
Sources & details
- Private bath checked Oct 2026
Nagato Yumoto Onsen Yumoto Kanko Hotel Saikyo
Yamaguchi
- Rooms with private open-air bath
No onsen analysis report on file yet
Sources & details
- Private bath checked Oct 2026
Tsuwano Onsen Yutoriro Tsuwano
Shimane
- Rooms with private open-air bath
No onsen analysis report on file yet
Sources & details
- Private bath checked Oct 2026
Tokyo Yugawara Onsen Manyou No Yu
Tokyo
- Rooms with private open-air bath
- Reservable private bath
No onsen analysis report on file yet
Sources & details
Source: in-room bath (sento47.com) · private bath (manyo.co.jp) · Checked May 31, 2026
Yumoto Yachiyo
Kagawa
- Rooms with private open-air bath
- Reservable private bath
No onsen analysis report on file yet
Sources & details
Source: in-room bath (yachiyo.cc) · private bath (travel.rakuten.co.jp) · Checked May 31, 2026
Yubara Onsen Gamuran
Yubara, Okayama
- Rooms with private open-air bath
No onsen analysis report on file yet
Sources & details
- Private bath checked Oct 2026
Taishokaku
Saitama
- Rooms with private open-air bath
- Reservable private bath
No onsen analysis report on file yet
How to reserve the private bathSources & details
Source: in-room bath (taishoukaku.com) · private bath (taishoukaku.com) · Checked May 31, 2026
Hotel Sugi no Yu
Nara
- Rooms with private open-air bath
- Reservable private bath
No onsen analysis report on file yet
Sources & details
Source: in-room bath (jalan.net) · private bath (travel.rakuten.co.jp) · Checked May 30, 2026
Aoi Gake
Miyazaki
- Rooms with private open-air bath
No onsen analysis report on file yet
PRIncludes affiliate linksView rates on Rakuten TravelSources & details
- Private bath checked Oct 2026
Source: in-room bath (aoidake.com) · Checked May 31, 2026
Yu no Yama Onsen Sanpokuen
Yunoyama, Mie
- Rooms with private open-air bath
No onsen analysis report on file yet
Sources & details
- Private bath checked Oct 2026
Kotohira Hot Springs Kotosankaku
Kagawa
- Rooms with private open-air bath
No onsen analysis report on file yet
Sources & details
Source: in-room bath (kotosankaku.jp) · Checked May 31, 2026
Unzen Onsen Togien
Unzen & Obama, Nagasaki
- Rooms with private open-air bath
No onsen analysis report on file yet
Sources & details
Source: in-room bath (azumaen.com) · Checked May 30, 2026
Okinawa Ittsu no Iro Onsen Resort Hotel Naha
Okinawa
- Rooms with private open-air bath
No onsen analysis report on file yet
Sources & details
Source: in-room bath (hinode-h.com) · Checked May 31, 2026
Ryukyu Onsen Senagajima Hotel
Okinawa
- Rooms with private open-air bath
No onsen analysis report on file yet
Sources & details
Source: in-room bath (churatoku.net) · Checked May 31, 2026
Sorted using onsen analysis reports and what each property states on its own or booking-site page.
Stays with the most evidence (analysis report, checked details) come first. Pick an onsen town to see every stay there.
Showing 100 of 657 stays. Choose an onsen town or prefecture above to see every stay listed there.
- Rooms with a private open-air bath
- The bath is part of your guest room (kyakushitsu rotenburo). Usually only some room types have one, so check the room type when you book.
The water in a room’s bath may come from a different source, or be heated or recirculated differently, than the shared baths. Even for stays with an analysis report, ask the property how the in-room bath is supplied.
Your location is only used to sort onsen towns by distance. It is not saved.
- HakoneKanagawa · 58 stays
- YufuinOita · 38 stays
- BeppuOita · 22 stays
- ArimaHyogo · 19 stays
- GeroGifu · 15 stays
- AtamiShizuoka · 14 stays
- IkahoGunma · 11 stays
- Higashi-Izu (Atagawa & Inatori)Shizuoka · 11 stays
Hokkaido & Tohoku4 towns · 24 stays
Kanto7 towns · 108 stays
Chubu17 towns · 138 stays
Kansai4 towns · 38 stays
Chugoku & Shikoku1 town · 5 stays
Kyushu & Okinawa5 towns · 76 stays
Browse by prefecture28 prefectures
A stay is listed only when its official website or booking-site page says some rooms have a private open-air bath. Usually only certain room types have one, so check the room type when you book. For reservable private baths (kashikiri) as well, see the private onsen list under “See also”.
- Private bath and tattoo information comes from each property's official website or other published information. Every item links to its source and shows the date we last checked it. Items we could not source are left out.
- Spring type, pH and how the water is used come from the onsen analysis report that Japanese law requires each facility to post, and from the facility's water-usage notice. They are shown only for stays whose report we have on file.
- Details can change after we check them. Please confirm with the property before you book, especially tattoo rules and private bath fees.
- Booking buttons are affiliate links. They do not affect which stays are listed.