Yatsugatake is a mountain course situated in Saku, in the Nagano Prefecture of central Japan, at an elevation that places it among the higher-altitude layouts in the region. The course takes its name from the Yatsugatake mountain range, a volcanic group that forms a dramatic backdrop to the east. The terrain here is characterized by rolling highland topography, cooler summer temperatures than lowland courses, and natural forest corridors that define many holes. Courses in this area typically feature significant elevation changes and routing that works with rather than against the mountainous landscape. Sunny Country Club operates the facility, which serves members and visitors in a region known for its resort character and seasonal appeal. The Saku area, positioned between the Japanese Alps to the west and the Yatsugatake range to the east, has developed as a recreational zone with multiple golf courses catering to players from Tokyo and other urban centers seeking mountain golf experiences. The course layout reflects the design approaches common to Japanese mountain courses from its era, with holes routed through forested zones and across natural contours. The setting offers views of surrounding peaks and benefits from the clear air and distinct seasons typical of highland Nagano. Winter conditions limit the playing season, while summer and autumn provide the primary windows for golf. The club facilities follow the Japanese country club model, with attention to dining and member services that complement the golf experience.