For an authentic and traditional vegan Japanese dining experience, Nijiya is a standout. This small izakaya specialises in chazuke (rice with tea/dashi) and offers beautifully presented tasting menus or sets that showcase dishes like stewed shiitake mushrooms and grilled origiri. I recommend getting a full set to try a bit of everything. The intimate setting, with only about seven seats, makes for a special meal.
Because of its location near Kawaramachi area, it's a highly popular restaurant with limited space. Be prepared for a wait and potentially a dine-in time limit.