[cirno]

Pretty much anywhere with a 10 minute walking distance to the Yamanote line will set you back about the numbers I've mentioned. You can of course go far out of your way and pay half as much, if you don't mind a very long commute each way to work. I would not recommend it given how crowded Japan's trains get during rush hour.

[benrbray]

You can go quite a bit farther out than Yamanote without increasing your commute by much. I once lived in Ota ward with a daily commute to Nihombashi. Door-to-door commute time was 25 minutes. Not too much worse than a 10-15 minute commute, especially when I can read / reply to emails on the way.

[amake]

There are plenty of reasonable commutes to be had well outside the Yamanote loop.