Ryugu Castle Apartment is a distinctive residential facility completed in 2016 in Ota Ward, Tokyo. Designed by Hiroyuki Miyabe and Yuka Yamanaka of SPEAC, this dormitory building represents a contemporary approach to shared living spaces. The architecture thoughtfully combines functional dormitory requirements with creative design solutions, reflecting the architects' innovative vision. Situated in Tokyo's urban landscape, the building serves as both a practical lodging facility and an architectural statement, offering architecture enthusiasts insight into modern residential design principles and the evolving nature of communal housing in contemporary Japan.