2 or 3 star Michelin Kappo
If you want something like ishikawa but cheaper, go to REN. It's just around the corner from Ishikawa, it's quite similar (the person running it trained at Ishikawa) and in fact has the same ownership. It is cheaper than Ishikawa, and lots of people seem to rate it more highly than Ishikawa (this does not include me, but I did think it was excellent and very good value).
If you want an English language write-up, I am pretty sure this place has two Michelin stars.