The kitchen operates without any animal products, making it fully safe for vegetarians as well. All dishes are plant-based, and the menu labels them as vegan/shojin.
Best vegetarian restaurants in Koto City
9 venues in Koto City rated S to B for vegetarian, every tier backed by cited sources.

Marugoto Vegan Dining Asakusa
Taito City · Vegan · VegetarianAll dishes are plant-based, so the kitchen is fully suitable for vegetarians. No animal products are used, which makes cross-contamination for vegetarian diets impossible.

T's Tantan
Marunouchi · Vegan · Vegetarian · €The entire menu is vegetarian and vegan, a fact confirmed by the venue and third-party sources. No animal products are used.

CAFÉ Tarot
Taito City · Cafe · VeganSince all food is plant-based (vegan), the venue is fully suitable for vegetarians. Same high care: no animal products on the premises, so cross-contamination with non-vegetarian ingredients is structurally impossible.

Vegan Cafe PQ's
Taito City · Cafe · VeganThis cafe is entirely vegan, so the kitchen operates on a plant-based basis and all items are suitable for vegetarians. No animal products are used.

Vegan Ramen UZU Tokyo (inside teamLab Planets)
Toyosu · VeganBecause the restaurant is entirely vegan, no meat, fish, dairy, or eggs appear in the kitchen. All dishes are therefore automatically suitable for vegetarians.
The entire menu is suitable for vegetarians, as all items are vegan.

VEGAN GYOZA
Taito City · Vegan · CafeAll menu items are vegan, so they are naturally vegetarian. The venue states no animal products are used. Suitable for vegetarians, though cross-contact with non-vegetarian items is not discussed.

Veggie Sushi Japan (Vegan & Vegetarian)
Taito City · Vegan · VegetarianThe restaurant's website states all dishes are 100% vegan, which also makes them suitable for vegetarians. However, the same page contains contradictory non-vegan items that appear to be template errors, so the venue should be contacted directly for confirmation before a visit.