[Polar]

Lunch sets are price fixed meals at restaurants almost everywhere running you about 800 and 900 yen, remember there is no tipping in Japan, it's a great way way of trying dozens of places.

McDonalds et all will run you the same price there as North America maybe a little more with the exchange rate.

I tended to focus on making lunch the big meal, breakfast I normally skip now and so it seems does most of Tokyo, the odd ones I had were around the 600 - 800 yen range.

As for dinner if you factor 2000 yen you should be good, you can do it cheaper or more expensive but I would say that's a safe number.