I'd pay a quid jimmy!
Be warned (again) though.. japan is a very odd place for the unaccustomed Westerner - my brother is married to a japanese girl and when he goes out there with her he gets very weirded out by the place and he's very well travelled.
The food is stomach turning and very few people speak english. If you could go with a japanese speaker it would help a lot I think.
Not wishing to put you off, just letting you know my experiences mate
