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Furuyu Onsen | A tranquil Saga retreat for healing in lukewarm waters

Published May 9, 2026·2min read

Nestled in the mountains of Fuji-cho, Saga City, Furuyu Onsen boasts a rich history, said to have been discovered by Jofuku around 2,200 years ago. It is renowned for its lukewarm waters, around 38°C, making it a beloved therapeutic spa for long, relaxing soaks that soothe both mind and body.

Table of Contents
  1. Overview
  2. Primary Spring Quality and Indications
  3. Water Characteristics and Best Season
  4. Access
  5. Nearby Attractions and Local Cuisine

Overview

Despite being located in Saga City, the prefectural capital, Furuyu Onsen is a tranquil hot spring resort situated in a quiet mountain valley along the Kase River. Its history is exceptionally long, with a legend stating it was discovered by Jofuku, an envoy of Emperor Qin Shi Huang of China, during his quest for the elixir of immortality. The name "Furuyu," meaning "old hot spring," reflects this ancient heritage.

Its most distinctive feature is the "nuruyu," or lukewarm water, which is close to human body temperature at around 38°C. This temperature is gentle on the heart and is said to have a high relaxation effect, allowing for extended, leisurely bathing. For this reason, it has long been known as a place for hot spring therapy (toji) and was cherished by many writers and artists. It is particularly famous as the place where the poet Mokichi Saito stayed for recuperation, composing numerous poems.

Primary Spring Quality and Indications

Simple

The spring quality at Furuyu Onsen is Alkaline Simple Hot Spring. This gentle water is mild on the skin and is also known as "Bijin-no-yu" (water for beautiful skin) because it leaves the skin feeling smooth. It is colorless, transparent, and mostly odorless, making it suitable for everyone.

  • Autonomic instability
  • Insomnia
  • Sensitivity to cold
  • Rheumatoid arthritis
  • Gastrointestinal hypofunction

Water Characteristics and Best Season

The source temperatures are relatively low, ranging from 34.5°C to 43.6°C, so many facilities heat the water, but the comfort of the lukewarm bath remains. Some ryokans (traditional inns) offer baths with free-flowing spring water directly from the source. The gentle water can be enjoyed year-round, but spring, with its fresh green foliage, and autumn, with its vibrant colors, are particularly recommended for enjoying the onsen along with the surrounding natural scenery.

Access

Kansai Airport (KIX)Travel timeabout 4 h 30 min
RouteJR Haruka Express to Shin-Osaka Sta. → Shinkansen to Hakata Sta. → JR Limited Express to Saga Sta. → Showa Bus
Fukuoka Airport (FUK)Travel timeabout 1 h 30 min
RouteHighway bus to Saga Sta. Bus Center → Showa Bus to "Furuyu Onsen"
Tokyo StationTravel timeabout 6 h 30 min
RouteShinkansen to Hakata Sta. → JR Limited Express to Saga Sta. → Showa Bus from Saga Sta. Bus Center to "Furuyu Onsen"
Shin-Osaka StationTravel timeabout 4 h
RouteShinkansen to Hakata Sta. → JR Limited Express to Saga Sta. → Showa Bus from Saga Sta. Bus Center to "Furuyu Onsen"

Facilities with Analysis Reports

No facilities with registered analysis reports in this area yet.

Facilities Without Analysis Reports

Nearby Attractions and Local Cuisine

  • Clear streams and valley beauty of the Kase River
  • Visiting monuments of Mokichi Saito's poems
  • Eiryu Onsen (a public bathhouse)
  • Dondon-no-fuchi Waterfall
  • Jofuku Longevity Hall
  • Saga Beef
  • River fish (carp) cuisine
  • Neighboring Kumanokawa Onsen
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References

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