I visit this place about twice a month and their bentos are amazing. They aren't lame konbini bentos with cheap ingredients either; they are lovingly-made with restaurant-quality items. Some items I've gotten in my bento before are daikon (Japanse white radish) dumplings with soy milk & herb sauce, black sesame mochi, vegan taco rice, marinated seasonal vegetables, etc. All vegan bentos come with either red or brown rice. On any given day, they usually have 3-5 different vegan options available although they decrease as they sell out. Can also order in advance. Their bentos are also sold at Natural House grocery store in Aoyama and in several department stores.
Address above is incomplete. Should be: 1-10-10 Tomioka, Koto-ku, Tokyo. In Japanese: 江東区富岡1-10-10
Cons: limited space to eat inside