Suga- joking As many will know, having tattoos is stigmatized in Japan (in fact in many parts of East Asia too), being mainly associated with the underworld such as the Yakuza (male dominated organizations). Secondly, the legal age for tattoos in Japan is 20. Even after the age of 20, it is a very big sign of rebellion that crosses the line in Japanese society. When seen in public, it invites the rest of the Japanese society (note: if you are clearly non-Japanese looking, they may view it as simply a gaijin thing, but there will be people who will still stare) to judge you. Many places require them to be covered up (long sleeves, etc). You will get rejected at onsens/baths (unless they are run by Yakuza and probably used by other Yakuza). Even tolerant firms will usually require employees with tattoos to cover them up (many will simply reject you if they know that you have). With a tattoo, even if you are not a current or former member of the Yakuza, you can be viewed as a potential troublemaker because you are viewed as someone who cannot follow social norms. That said, if the agency forming an idol group want to form a group with a clean image, I think they will require aspirants to declare or even screen them for tattoos. Besides, I doubt Japanese wotas, let alone casual fans will accept an idol with tattoos. Mind you, these are not chika idols but mainstream national idols that appear on prime time TV. Yes, you can't cover it up in the baths (no swimwear allowed). Even gajins don't get a free pass on this. Unless those small tattoos are in positions that are covered even by swimwear (I'll leave it to you to figure out where), >99.99% no. As an idol who may do modeling and gravure shots for PBs, tattoos are simply not allowed, unless they are doing it for some highly unconventional magazine on tattoos (which I highly doubt will happen for mainstream national idols).