The Koga Sports Forum, completed in 1991 and designed by architect Kunihiko Hayakawa, stands as a distinctive multipurpose complex in Koga, Ibaraki Prefecture. This ambitious facility seamlessly integrates outdoor and indoor sports amenities with museum spaces and commercial areas, reflecting the architectural philosophy of the early 1990s. Located in the Nishi district along the riverfront, the forum exemplifies thoughtful mixed-use development that serves both recreational and cultural functions. Hayakawa's design demonstrates sophisticated spatial planning, creating a cohesive environment where athletic pursuits, educational exhibitions, and commercial activity coexist harmoniously within a unified architectural vision.