hey there,
have fun, japan is a blast. Remember though that drugs there are a very serious charge, worse than most states even. You will probably be able to find e at some of the clubs in the roponogi district, although it would be good to meet up with some cool locals who have hookups. As well the e will probably be very expensive... When i went a few years ago, my girlfriend suprised me with e's she had smuggled with her. We dropped and wend to the arcades in Shinjuku, super fun.
jackfunk