/jp/ - Otaku Culture

If you know where to go, you can stay at some really cheap places.
For example, there are the capsule hotels which I believe cost around 3000 yen per night.
There's also this place which I stayed during my first night of travel in Tokyo last summer and it is kind of like an internet cafe, but you get an assigned booth that's about 1.5m x 1m and you also have access to a library of manga books, free drinks, shower room, and few other things which I cannot remember right now. You pay an hourly fee, but if you go after 9pm (iirc), you can stay for 8 hours (?) at a much discounted fee. I cannot remember the name of it right now, but I have the membership card at home which should have the name of this place on it. (Membership is free or maybe a one time fee of like 100 yen for the card, and is mandatory). Oh, and this is like ~10 minute walk from Ikebukurou JR station.

As for the language barrier, I knew next to no Japanese when I went to Tokyo, but since I am fluent in written and spoken corean, and knowing some kanji, thanks to it having the same meaning in the two languages, I didn't have too much trouble during my stay in Japan. I do suggest that you carry around one of those small books packed with useful short phrases, however.

When you go to Akiba, this is a nice place for shopping which hasn't been mentioned yet.
http://www.kamifusen.jp/

For moving around, do get a Suica card, as others have suggested, as it is incredibly useful.

ehh... I will post more tips as I remember them.