San Jose (California)
Whats the best place for late night ramen in little tokyo?
The only ramen place in Little Tokyo I've been to after 1am is Koraku Ramen (open until 3am), and I'm not entirely sure but it might be the only one open that late. It's not the best ramen in town but it hits the spot and affordable. They also have a lot of other options other than ramen.
Not sure about late-late night spots, but my personal favorite downtown is Daikokuya.. it's just a little hole in the wall & there definitely can be a wait, but the ramen is amazing! I take everyone there from out of town.