Yamanashi is known as the biggest producer of grapes in Japan, and Katsunuma, located to the east of town, is the central area for this fruit, which was introduced by the Buddhist monk Gyoki 1,200 years ago. Today, many vineyards are scattered around Katsunuma. Wine has been made here since the late 19th century, and about 80 wineries produce their own wines today. Budo-no-oka Winery is one of the flagship wineries of Koshu. It is located on a hill and is surrounded by vineyards. In addition to a wine cellar, a shop, and a restaurant, it also offers fully- equipped accommodation.