Shiro Gelato and Snacks is a Japanese snack cafe offering vegan sorbets, onigiri rice balls, warabimochi, and various drinks like matcha and hojicha lattes. Vegan options are clearly marked with VG. (but the strawberry range is not vegan as the strawberry powder they use to mix with the milk has dairy.)
The sorbet flavours change regularly; I tried the lemon & yuzu flavour during my visit. I recommend the Shiro Lover style, where the sorbet is wrapped in mochi skin and topped with a few pieces of warabimochi. The sorbet was tasty, and the warabimochi was soft and fresh.