[QUOTE=dge;26704056]Perhaps of interest to you then: a Nekotalia-themed cafe in Anime Plaza's Akihabara store, open until 28th June. Here are the links to the (Japanese) Hetalia and Anime Plaza sites:
http://hetalia.com/twt/event/1188.html
http://www.adores.jp/anipla/nekotalia-ak/index.html
Complete manga sets can be had dirt-cheap at Book Off. A perfect excuse to start learning Japanese.
There's Cosplay Festa on 4th/5th June in Tokyo Dome City and Cos-Day on 12th/26th June in Tokyo Big Sight. I'm not really interested in Cosplay, so I have no idea how open these events are. Since Tokyo Dome City is open to the whole public, it could well be that you can see cosplayers there "in the wild", but for the events itself you have to register as either cosplayer or photographer in order to attend, I think.
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To quote what my daughter might say if she were responding: "THIS IS AWESOME"! Thank you so much - chances are we would have missed all/most of this, even with guide.
I think we'll leave it a bit of surprise - especially the Nekotalia - she's going to go crazy! Loves Hetalia AND cats, so I could not have imagined a more perfect event. Hope the goodies don't all get sold out - she's saving up allowance money for souvenirs. The cheap manga tip should help with that, though!
Don't know how much Japanese she will learn, although she's already picked up some, but Japanese/Asian studies and study-abroad in Japan options are definitely on her list of criteria as she starts to look at colleges. She will likely do a gap year, so if you or anyone knows of any good programs which include Japan in the itinerary, that would be useful!