Kainosawa Onsen

Ani, Akita, Japan

Location: Ani, Akita, Japan
Water type: sulfurous, thermal
Temperature: 46 °C
pH: 6.5

Water profile

Thermicity

Sedative

46 °C

LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation

Bio-active

LowHigh

Rich in active gases or metals — a strong mineral character.

Buoyancy

Standard buoyancy

LowHigh

Soft water — natural, classic buoyancy.

SoufreSulfuresSulfates

Kainosawa Onsen, in Ani, Akita Prefecture, heats sulfurous thermal water to 46°C (pH 6.5). An indoor bath, an outdoor rotenburo and a sauna round out this northern Japan hot-spring stop.

Insider tip — Hidden in the mountains of northern Akita near the Ani ski area, Kainosawa Onsen offers rustic backcountry bathing in the Tohoku tradition. Sulfurous waters emerge from deep within the Ou Mountains. Known mostly to local enthusiasts — a true off-the-beaten-path discovery.

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

Nearby

Kawabe Iwami Onsen

Kawabe, Akita

Sakura Onsen; Sakurasakura

Akita, Akita

Kyowa Onsen (Akita)

Daisen, Akita

Otakiyama Onsen; Kami no Yu

Akita City, Akita Prefecture

Frequently asked questions

How hot is the water?

The water runs quite hot here, around 46 °C — a sedative water that brings immediate muscle release.

What type of water is found here?

This spot features sulfurous & thermal water.

What is the best season to visit?

The most favourable period for this spot is: Toute l'année.