Tattoo shops in Tokyo?

Real tattoo, not fashionable ones are deeply concerned to underground industry in Japan. It is almost quite illegal connection. They don't disclose sales advertisement in public. It is so confidential and verbal communication only available.

Check Google:
http://www.google.com/search?q=tattoo+shop+in+tokyo&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a

Tattoos are associated with organized crime. There aren't any mainstream places you can go to to get tramp stamped in Japan.