LocationKomagome 5-chome, Toshima City, Tokyo Hot springTokyo Somei Onsen (iodine-containing sodium chloride strong salt spring, 46.6 °C) SaunaStadium sauna, cold bath and cool-down space
Introduction
Amber water and a tiered sauna The official site invites you to look up at the open sky while bathing in the amber natural hot spring. The cypress indoor bath is kept lukewarm.
The baths have a tiered “stadium sauna”, a cold bath and a space to cool down.
01 · Sauna
The stadium sauna A wooden sauna with tiered benches.
02 · Cold bath
Cold bath and cool-down space A cold bath and a space to rest after the sauna.
The cold bath The cool-down space 03 · Outdoor baths
Amber outdoor baths Outdoor baths of the amber natural hot spring.
The outdoor bath under a timber roof The rock outdoor bath 04 · Indoor bath
Cypress bath A lukewarm bath in a cypress tub.
The cypress indoor bath What is a strong salt spring?
A hot spring with a very high salt (chloride) content.
Tokyo Somei Onsen is an iodine-containing sodium chloride strong salt spring, amber in colour.
Photos © Tokyo Somei Onsen SAKURA (official website “Onsen”)
Sources Tokyo Somei Onsen SAKURA official website
Plan your visit Information on this page may be out of date or contain mistakes. Please always check the official website before you go.
Hours 10:00–23:00 (reception closes 22:30)
Price Adults ¥2,100 weekdays / ¥2,900 weekends and holidays (towels and loungewear for hire)
Has Outdoor bath Hot spring
Tattoos Not allowed, whatever the size.
Towels Towels and loungewear are for hire (towel set ¥350, loungewear ¥450).
Checked against the official website on 16 October 2026
Getting here
Shuttle bus between Sugamo Station (JR Toei Mita Line) and the spa (last bus to Sugamo 23:10) 東京都豊島区駒込5-4-24 東京染井温泉 SAKURA
Komagome, Tokyo, Japan
Show the Japanese address to a taxi driver or ask at the building.
Visit the official websitePrices, bookings and rules are on the facility's own site, often in Japanese