Mitoyo Onsen Kagawa

Mitoyo, Kagawa, Japan

Location: Mitoyo, Kagawa, Japan
Water type: bicarbonate
Temperature: 40 °C
pH: 8

Water profile

Thermicity

Sedative

40 °C

LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation

Restorative

LowHigh

Loaded with major ions — the essential minerals (Ca, Mg).

Buoyancy

Standard buoyancy

LowHigh

Soft water — natural, classic buoyancy.

BicarbonatesSodiumCalcium

Mitoyo Onsen in Kagawa Prefecture faces the gentle waters of the Seto Inland Sea, offering panoramic views of the island-dotted waterway that has inspired Japanese artists and poets for centuries. The sodium-bicarbonate spring water is silky and alkaline, prized for softening skin and relieving the fatigue of agricultural and artisanal labour in this productive coastal plain. Mitoyo's famous Chichibugahama beach, often photographed for its stunning sky reflections at low tide, makes this onsen town an increasingly popular destination for travellers combining natural beauty with thermal relaxation.

Insider tip — Mitoyo occupies the southwestern coast of Kagawa Prefecture where it borders Ehime, and its bicarbonate spring water is thought to derive from limestone-filtered groundwater typical of Shikoku's karst geology. The Nishiki Beach area nearby is one of western Kagawa's most scenic stretches, making a beach morning followed by an onsen afternoon an ideal day plan. The water's alkaline quality leaves skin feeling polished, and local signage often describes it in terms reminiscent of Dogo Onsen's storied tradition. Small independent bathhouses outnumber hotel facilities here.

Find hotels nearby →Tickets & activities →See the map & practical info →