Typical Japanese food and Roppongi... hmmm... not my first choice of area to get a taste of Nihon ryori (Japanese cuisine).

Not saying it can't be done though (in Tokyo anything seems possible )

Please check out this thread http://www.flyertalk.com/forum/showthread.php?t=635824 as the Japan forum regulars often get together in Roppongi for Mabo dofu prepared by an iron chef.

If you post in it, they may come (although I think I might have gotten two Kevin Costner movies confused with that last comment)

Itadakimasu!