Although they sound promising, tofu restaurants mostly serve tofu dishes containing fish or meat! Most of them usually have a couple of items which are ok though, but tend to be expensive.

Search this site for recommended veg-friendly tofu restaurants in Tokyo.

Yakiniku is a cuisine that came from Korea. Although these are restaurants specialising in grilled meat, you can sometimes find ones with a surprising range of veg-friendly choices. You'll have to put up with the smell of burning flesh, and insist on a seperate grill than your meat-eating friends, as in these places you cook the food yourself. Check out the menus and sometimes you'll find vegetables to grill (usually mushrooms, capsicum/green pepper, onions and eggplant), plus side dishes like salads, kimchee, etc.

Take a look at some recommended Japanese restaurants in Tokyo.