This is a good Yum Cha (Dim Sum) restaurant in Nasu. It seems to be a sister restaurant of the Cowherd Restaurant which we have not been to yet.
We went for Saturday lunch and it was not at all busy. The interior is very nice. We chose to sit by some big windows, there are areas behind cloth screens and it looked like some private rooms too.
They have a picture menu and you can order various set meals or all you can eat from the menu (3000 yen). They have most of the common Yum Cha items. When they deliver your food, they bring it on a cart and you can choose other items from the cart then too. The quality is very good. We recommend this restaurant.