I have previously seen articles on the Japanese propensity for dressing up like anime characters. They call this practice "cosplay" (costume play). Akihabara is one area in Tokyo where cosplay is prevalent and particularly a form of cosplay called "Maid Cafes."
Maid Cafes are themed cafes where the female waiters dress like maids and treat the customers like masters. As this article from the New York Times points out, despite the wildly sexual premise (Can I get down on my knees and put sugar in your tea, Master? Cheers.) there is no touching and the atmosphere is almost family. NYT notes the guest book contains such gold as:
There are also a few butler cafes catering to the very small minority of powerful Japanese women.
Akihabara is the high tech centre of Tokyo although successive recessions have seen it fall on hard times and be the site of a massacre in which seven people were killed and more than 20 injured by a disgruntled auto parts factory worker.
Akihabara is still known as the home of electronics and manga. H.I.S runs a tour of the area, the guy from which is actually featured in the video below about maid cafés. On an unrelated point, the kimono workshop run by H.I.S also looks good.