We've driven past St. Michael's many times. Its a rather kitch looking castle that fits into its Nasu Tokyo visitors paradise environment. We've never been tempted to go in. After 2 very positive visits it seems we have to admit we were mistaken.
We stopped in hoping to have our lunch there. We know their sister restaurant in Nasu Garden Outlet to have rather good Italian food. We were too late for lunch but had very good desserts and ok coffee there for not much more than 1000 yen a head. The service was great.
So we decided to have a meal there. Warning: Its not as cheap as the places we normally write about. When we went they had set menus for 6000 and 9000 a head and an a la carte menu. We all ordered the 6000 yen set menu. It was excellent quality with interesting dishes and diverse tastes, well worth the money. The restaurant was beautiful and the service very attentive. We felt very out of place in our Nasu hiking gear. We're going to need to go back for good photos. Next time we have a plan to stay up in Nasu and go there. The food would definitely pair well with a good wine.
I still think the chapel is a bit kitch. The main building is pretty nice and the dinning hall is great!