Grin Grin, the central hub facility of Island City Central Park in Fukuoka, stands as a remarkable example of contemporary Japanese architecture. Completed in 2005 and designed by the renowned Toyo Ito Architects, this innovative structure seamlessly combines a botanical garden and aquarium within a single cohesive design. Located in Kashii Hama, East Ward, the building exemplifies Ito's signature approach to creating spaces that harmonize natural elements with cutting-edge architecture. The facility's fluid forms and integration with the surrounding landscape demonstrate how modern design can enhance public engagement with both botanical and marine ecosystems.