I come here fairly often for lunch and their ramen is good. My favourite one is the white sesame ramen, probably because of the novelty of grinding the sesame seeds.
Similar concept to this is the Chicken Katsu meal, where you can grind the sesame seeds and it comes with various side dishes. It's a very filling meal as you can see!
I'm giving this a 4/5 because I don't really like the chirashi (forgot to take a picture) and their service can be quite slow at lunch.