Janoyu Onsen

Tokyo · 蛇の湯温泉

Janoyu Onsen is a hot spring town in Tokyo, Japan. It measures pH 10.5 — strongly alkaline. Officially the water is classed as simple spring and sulfur spring. 1 inns take visitors here.

Getting there

From Tokyoabout 2 h

CarNot needed

JR PassCovers the train

Train to Musashi-Itsukaichi Station (JR)
Local bus

Fly into Haneda or Narita. Times are rough estimates worked out from station locations, not a timetable — check the exact route on Google Maps.

Simple springSulfur spring

The water here

Simple spring 単純温泉

Mild and low in dissolved minerals. Usually clear and gentle on the skin, which is why these baths are often recommended for first-timers.

Sulfur spring 硫黄泉

The classic rotten-egg smell and milky white water. It can tarnish silver jewellery, so take it off.

Things to see nearby

Hachiōji CastleCastle · 20 km

Mount MitakeMountain · 11.1 km

Mitō FallsWaterfall · 2.3 km

Hossawa FallsWaterfall · 8 km

Musashi Mitake ShrineShrine · 11 km

Okutama Mizu-to-Midori-no-FureaikanMuseum · 7.4 km

Places from Wikidata, photographs from Wikimedia Commons. Distances are in a straight line from the town.

With tattoos

Many public baths still turn away visible tattoos, and the rule is set by each bath, not by the town. The reliable way round it is to bathe privately: a room with its own open-air bath, or an inn with a private bath you can book for yourselves.