Tattoo Cover Hacks (タトゥーとカバーシール - Tatū to Shīru)
The strict tattoo prohibition policy at many traditional Japanese bath houses. Worshippers with ink can utilize waterproof 'tattoo cover patches/stickers' to hide small tattoos, or book private rentable baths ('Kashikiri-buro') to soak freely.
Historically associated with the 'Yakuza' (Japanese mafia) in the 20th century. To keep standard guests feeling safe, bathhouses banned ink altogether. Today, globalization is slowly softening these rules via sticker friendly baths.
For small tattoos, buy skin-toned waterproof cover stickers at drugstores and apply them before entering. For larger ink, search for 'Tattoo-Friendly' onsen databases or book a private family room bath.
What is the smartest hack for travellers with tattoos to enjoy Japanese hot springs?