Marugame Seimen (丸龟制面)
Super good cheap and quick noodle soup aka udon. Come early, otherwise long time to queue.
My onsen egg topping on the beef noodle is cold..which is not really "Onsen" at all. The quality here could be inconsistent according to demands.
Semi - self service Japanese noodle place ... Clear soup udon, Cheap and good for a raining/cold night
they're not as fast as they claimed to be