Ikouan is a residential lodge completed in 1982 and designed by Isao Ishii of Bi-ken Design Office, located in Kawaratsu, Toyo City, Ehime Prefecture. This accommodation facility showcases the architectural sensibilities of early 1980s Japanese design. The building demonstrates thoughtful consideration of its spatial composition and integration with its surrounding environment. As a purpose-built lodging structure, Ikouan represents a significant example of contemporary hospitality architecture from that era, offering valuable insights into how designers approached functional requirements while maintaining aesthetic principles during this pivotal period in Japanese architectural practice.