In Ohnan town, there is a fancy Italian restaurant called Ajikura. They serve delicious dishes and a variety of wines, alcoholic drinks and soft drinks. The best thing about this restaurant is that all vegetables they use are grown by local people. So, they are safe to eat, fresh and tasty.
I recommend the Pasta-course ( Look for パスタコース on the menu.) It’s 1,888 yen. There are different kinds of pasta and you can choose one. You can go there for lunch without a reservation but if you have a reservation, it would be better, and for dinner you need to have a reservation.
They also have a DJ event there once every two months. You can enjoy DJ music and some shows.