Sumire
佐倉天然温泉 澄流さくらてんねんおんせん すみれ
Day Use
YesWeekday adult ¥1,050 / weekend & holiday adult ¥1,200; children (under 13) ¥500 weekday / ¥600 weekend. Price revised April 2026.
Bathing & Water
Open-air outdoor bath
Enclosed indoor bathing area
Dry heat sauna room
Cold water plunge bath, typically used after sauna
Uses natural hot spring water
Capabilities
Shared bathing area for all genders
Policies & Services
Allows entry with visible tattoos
Welcomes children and families
Children in diapers or training pants not permitted in baths/changing areas. Ganbanyoku (stone spa) for ages 13+ only. Mixed bathing not allowed for ages 6+ and those 120cm+ tall.
Restaurant or dining open to visitors (not just hotel meal plans)
Shower, wash stations, soap and shampoo provided
Towels available to rent or borrow
Relaxation space for after bathing
On-site or nearby parking available
Views
ForestHighlights
Ganbanyoku
Jet Bath
Electric BathAbout
Sakura Tennen Onsen Sumire (佐倉天然温泉 澄流) draws from its own spring, Sakura Someino Onsen (佐倉染井野温泉), pumped from around 1,500 meters down. The water is strongly salty, runs free-flowing (kakenagashi, 源泉かけ流し), and leaves the skin noticeably smooth. The open-air bath sits inside a bamboo grove, which gives it a calm, enclosed feel quite different from the usual suburban spa. Indoors you have jet, bubble, and electric baths alongside a deep cold plunge. The two saunas, an auto-lauyu and a yomogi (よもぎ) mud-salt sauna, are a draw in their own right. The ganbanyoku (岩盤浴) complex, called LeLu (the Finnish word for toy), has several themed stone rooms. Opened in December 2016.
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