“Tattoo is not taboo,” insist two hair dye company employees, and they’ve developed the product to prove it—vanishing tattoos made with special inks that disappear in a week. While tattoos are widely ...

We may earn a commission from links on this page. Last year, 15 million people visited Japan, setting a new record. Millions more are expected. Many foreigners, eager to see the sights and spend cash, ...