Nothing in particular.
These three are handy but none is required:
- Apron: flour and dusting starch fly onto your clothes (rental available, 100 JPY).
- Socks: for when you stomp the dough through a plastic bag (bare feet are fine if you don’t mind — just take care not to tear the bag).
- Ice pack / cooler bag: your udon and the take-home dipping sauce need refrigeration, useful if you’re taking them home (set available, 400 JPY).