Walking around in Kagurazaka and Iidabashi we accidently came across Yasai Shokudo Sakurasaku. We had the vegetable curry (lunchset around 1100¥) and got salat, a soup and a drink. The curry had LOTS of different vegetables and was really good. Different to the usual japanese curry, it seemed to have a tomato base.
The curry definitely is vegetarian, but not all dishes are. So if you want to take another one you should ask.
4-3 Kagurazaka, Shinjuku