I want to know about a Buffet-style inn in Manza Onsen where foreigner can choose what they like

The husband of the host I stayed with during my university days is coming to Japan on a business trip, so I'm thinking of taking him to Manza Onsen. He is a big fan of Japan, but he can't eat all Japanese food. So I'm looking for a place to stay that has Buffet style meal so I can choose what I like. Can you recommend any?