Kanto Ichihara, Chiba
Tennen Onsen Yubune Ichihara Chiharadai
天然温泉 湯舞音 市原ちはら台店
Name in Japanese. Look for this on the sign, or show it to a taxi driver.
Allowed with conditionsStated by the facility
Super sento (large day-bath complex). Hot spring (spring details not checked)
Tattoo rule
Allowed with conditionsStated by the facility
What the official page says
刺青・タトゥー・ボディペインティングシールが入っている人でも利用できますか？ 当館指定のカバーシール２枚（縦横10cm）でタトゥーを覆うことができれば、貼った上でご入館可能です。
In short: Tattoos must be covered with up to two of the facility's 10 × 10 cm cover stickers.
Where it is
Kanto region, Chiba prefecture. About 41 km in a straight line from Tokyo.
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Rules can change. Check the official page on the day you go. Any paid link is labelled next to the button. We have not visited this bath ourselves.