I was here on my last trip to japan (holiday) with the owner of Guesthouse Iriwa (Gon Jung Choi). They serve alot of wonderfull dishes, which are almost all dipped in the same kind of sauce which i cannot describe other than delicious.
If you like tempura, you should definately check this place out. Although english might be a tad of a problem. Try to bring a local who can translate for you.
They also serve giant beers here, which is nice when its hot (and its pretty damn cheap aswell).
They have private rooms if you wish to sit quietly with friends or family and even rent out guest rooms in traditional japanese style. So might also be an idea to spend a couple of nights here.