I found this via the HappyCow app, or should I say despite that app! The name changed, so the one in the app is wrong (previously Kichiemon).
This is a tiny juice bar/café, with seating for one inside, and a picnic table outside that seats four.
I think most of the drinks are vegan/vegetarian, they have wonderful salads (much more colourful than regular Japanese salads) which have chicken and non-chicken variants.
They also do a wonderful vegetable soup, which you can have with a rice bowl or a bread roll.
Overall, everything is very healthy and green, I think I would like to go back in summer because I didn’t feel like drinking cold juice when it was -2° outside!