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Photo: おにく · CC0 · Wikimedia Commons

Iiyama Onsen

Kanagawa · 飯山温泉

Iiyama Onsen is a hot spring town in Kanagawa, Japan. It measures pH 11.3 — strongly alkaline. Officially the water is classed as simple spring. 2 inns take visitors here.

Getting there

From Tokyoabout 1½ h
CarNot needed
JR PassNot a JR line
  1. Train to Hon-Atsugi Station
  2. Local bus, about 20 min

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 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.

Things to see nearby

Hayato Great FallsWaterfall · 13 km
Iiyama Kannon TempleTemple · 1.6 km
Mount ŌyamaMountain · 7.8 km
Hachiōji CastleCastle · 19.9 km
Shiokawa FallsWaterfall · 5 km
Ōyama Afuri ShrineShrine · 7.9 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.

Rooms with an open-air bath — KanagawaInns with a private bath — Kanagawa

More on tattoos and onsen

Where to stay

Onsen inns — Atsugi City

Opens Rakuten Travel, which lists inns in English. Onsen Guide earns a commission if you book through these links, at no extra cost to you.

Hot spring towns nearby

Kabutoyu OnsenKanagawa · かぶと湯温泉2.9 km southwest
Simple spring
Koutakuji OnsenKanagawa · 広沢寺温泉3.4 km southwest
Simple spring
Nanasawa Onsen-kyoKanagawa · 七沢温泉3.9 km southwest
Simple spring
Hanbara OnsenKanagawa · 半原温泉5.7 km north
Sulfur spring
Isehara OnsenKanagawa · 伊勢原温泉6.8 km south
Simple spring
Tsurumaki OnsenKanagawa · 鶴巻温泉11 km south
Chloride spring

Similar water elsewhere

Towns further away with the same kind of water — useful if this one is hard to reach or fully booked.

Yujimata OnsenFukushima · 湯岐温泉Also simple, similar pH
Simple spring
Inuyama OnsenAichi · 犬山温泉Also simple, similar pH
Simple spring
Ashio OnsenTochigi · 足尾温泉Also simple, similar pH
Simple spring
Asahi OnsenShimane · 旭温泉Also simple, similar pH
Simple spring
Gokayama OnsenToyama · 五箇山温泉Also simple, similar pH
Simple spring
Kasuga OnsenNagano · 春日温泉Also simple, similar pH
Simple spring

The numbers

pH
11.3 (strongly alkaline)
Inns
2
Address in Japanese
神奈川県厚木市飯山

Figures from the town's Japanese Wikipedia article.

Where it is

35.4790, 139.3043 — open the map

Read more

Japanese Wikipedia

Planning a first soak? Read how an onsen stay works, and what to do if you have tattoos.