I'm going to Tokyo tomorrow and staying with family, apparently general stuff is much cheaper now with the weaker Yen, it's almost 200 to the pound now. Obvs still expect to be paying £7-9 quid for a pint and the like but it's meant to be not so bad at the moment for good, shopping and stuff.I take it you have never been before
Having said that l, I remember it as pretty expensive last time I was there 10 years ago or so, but I'm in Hong Kong atm so it probably is cheap in comparison!