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KAMENOI HOTEL IZUKOGEN

亀の井ホテル 伊豆高原かめのいホテル いずこうげん

Sea-view and starlit baths that swap sides every morning

Lodging
Chubu·Shizuoka

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

SaunaYes

Sauna room of any kind

Cold BathYes

Cold water plunge bath, typically used after sauna

Bathing Arrangements

Private BathYes

A private bath you can reserve for yourself or your group

Reservation-required private outdoor+indoor bath, 1 hour / 4,400 yen, four time slots 15:30-21:00

Room OnsenYes

Private onsen bath in guest rooms, for overnight guests only

Mixed BathingNo

Shared bathing area for all genders

Policies & Services

TattooWith Conditions

Allows entry with visible tattoos

Guests with tattoos may bathe if the tattoo is not visible to other guests

KidsWith Conditions

Welcomes children and families

Opposite-sex children may bathe together with a parent only up to age 6, per Shizuoka public-bath ordinance

ParkingYes

On-site or nearby parking available

Views

Sea

Highlights

Steam Sauna

About

The hotel has two large baths, Manten-no-yu (満天の湯) and Gekko-no-yu (月光の湯), and swaps them between men and women every morning, so you get a different bath in the morning and at night. Both have an indoor bath, a lie-down bath, and a sauna. Manten-no-yu's outdoor bath is a round pool up a short flight of stairs with a view over the Izu Islands, while Gekko-no-yu's outdoor bath faces the night sky. The water has a light saltiness typical of this stretch of coast. There's also a reservable rotenburo-and-indoor-bath set for more privacy, and the higher room categories come with their own private open-air onsen bath.

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NH
Nadya Ho
6 months ago

KAMENOI HOTEL IZUKOGEN 亀の井ホテル 伊豆高原 We stayed in Izu at Kamenoi Izukogen. We had not stayed at other hotels in this chain before. This Kamenoi has been recently renovated, the hotel itself is not new, but the interior has recently been brought up to a modern look. All rooms face the ocean. The onsen consists of two baths, one indoors and one outdoors, and they alternate by day. The indoor bath has a nice view of blooming sakura. The water in the rotenburo is hot, while indoors it is relatively comfortable, not that hot. It is easy to breathe indoors. There were few people. There are private baths that need to be booked separately, and they cost ¥4 400 per hour. The staff at the hotel are Japanese, the service is at a good level, and most of the guests are Japanese as well. Free shuttle service to and from Izu-Kogen Station. Consistently good and varied kaiseki for all three evenings, not outstanding, but high quality and fresh. A very varied and generous breakfast buffet. The best breakfasts of the whole trip. Free drinks, including alcohol in the evening, in the lobby, and later at night there is free late-night food in the form of noodles with different flavors.

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Onsen Oni

Last updated October 7, 2026