KOYA is a striking office building located in Kamiyama, Tokushima Prefecture, completed in 2015. Designed by architect Kiyokazu Suma and Nawaken Gym, this structure exemplifies contemporary Japanese architectural sensibility. The building successfully integrates modern design principles with its rural mountain setting, creating a harmonious dialogue between built environment and natural landscape. KOYA demonstrates thoughtful spatial planning and material selection, making it a noteworthy example of contemporary office architecture. Its design approach offers valuable insights into how functional commercial spaces can be realized with artistic vision and contextual awareness.