THE_B is a small but fully vegan spot near Omotesando station, and it's a great stop if you are looking for something healthy for your trip.
The menu primarily features a variety of salads (including a unique nato option), bowls like tasty acai bowls, smoothies, and soups. They also offer house-made vegan cheese, cheesecakes, and cookies.
Keep in mind that seating is very limited – there are only about four seats available, making it mostly suitable for takeaway food.