Kanto Minato, Tokyo
Sauna Tokyo
Name in Japanese. Look for this on the sign, or show it to a taxi driver.
Sauna and bath facility in Akasaka. Bath facility; water source not checked
Tattoo rule
What the official page says
大きさに関わらず、当店指定のタトゥーシール（500円）を所定の位置（左胸あたり）に貼っていただければご利用いただけます。
Whatever the size, you can use the facility if you put the shop's tattoo sticker (500 yen) on the set spot (around the left chest).
Any size of tattoo is allowed if you buy and wear the facility's 500-yen sticker on your chest.
The sticker is a marker, not a full cover.
Where it is
Kanto region, Tokyo prefecture. About 3 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.