Green Oasis is a welfare facility completed in 1995 located in Okuganosako, Kuka Town, Kuga District, Yamaguchi Prefecture. Designed by Nakago Morishige Comprehensive Environmental Design, this building represents an important example of 1990s Japanese welfare architecture. The project exemplifies thoughtful environmental design principles integrated with functional facility planning. Its completion marked a significant contribution to social infrastructure development in rural Yamaguchi, combining practical welfare services with architectural consideration for user comfort and community integration.