Like Japanese and beyond just Sushi and Udon?  Chiyoyumei may be the place for you.  That is if you are willing to pay.

Chiyoyumei is a Japanese restaurant specializing in Kaiseki ryori.

Kaiseki ryori is traditional multi-course Japanese dinner.  Its philosophy is simple -- provide the taste straight from the ingredients.

The service is said to be of the highest quality with courteous and professional waitresses to tend to your needs while you're dining.

Do expect to pay as the full Kaiseki course at Chiyoyumei will set you back 180,000 won a person.  If you go for lunch, it will cost 30,000 for a Sushi meal.