ok everything that you want to do in japan DO IT xD but first learn japanese or you will be soo lost in japan that you wont even know where to go
trust me i lived in japan for 5 years and those 5 years WAS THE BEST!!!, i went to tokyo from okinawa from their to hiroshima to everywhere in japan,
they have alot of arcades that have "namco", and trust me they are way better than our arcades here in the U.S xD
also their 99cent store is way better XD, and yes they have alot of anime, specially their rest stops they have tones of anime stores over their.
and the FOOOD IS AWESOME!!!!!! oh and dont act like a american or they will just stare at you trust me my dad was like that the first year i lived in japan xD