One thing to try are the Odon or soba noodles or Katsu Don, the Udon and soba noodles, katsu don (breaded pork cutlet) is delicious and worth trying.
It does seem popular with the late night crowd.
Get's four stars from me.
A foodie/travel blog as I move around. Covers NYC, Chicago, and more cities. Focus on seafood restaurants, techniques, cocktails and celebrity chefs and new restaurants they have etc.