Kasumigaura Dejima Golf Club's East Course occupies land along the shores of Lake Kasumigaura, Japan's second-largest lake, in Ibaraki Prefecture northeast of Tokyo. Designed by Onji Tsuneo, the course reflects the relatively flat terrain characteristic of the Kanto Plain while incorporating the lakeside setting into its strategic design. The routing takes advantage of the area's open landscape, where wind patterns off the water can significantly influence play throughout the year. The course layout emphasizes positional golf rather than dramatic elevation changes, with water hazards and bunkering serving as the primary defensive elements. Several holes offer views across Lake Kasumigaura, and the proximity to the water creates microclimatic conditions that affect turf management and playing conditions. The design incorporates traditional Japanese golf architecture principles from the era of its construction, balancing challenge for skilled players with playability for members of varying abilities. Kasumigaura Dejima operates as a members' club serving the greater Tokyo metropolitan area, drawing golfers who appreciate access to lakeside golf within reasonable distance of the capital. The facility includes multiple courses, with the East representing one component of the overall property. The region's golf culture emphasizes meticulous course conditioning and attention to service standards typical of Japanese private clubs, where the game is approached with both competitive seriousness and social tradition.