In 14th century Venice, Jews were only permitted to live in an area of the city known as Ghetto. The word has since acquired many more layers of unpleasant antisemitic connotations, yet Ghetto is marked on tourist maps of Venice today.

Maybe Tokyo will eventually become as open about its history -- but before that can happen, quite a few people will have to stop thinking about others by 17th century Edo period standards, it seems.