ANNEX, completed in 2005, is a residential project designed by architect Junn Igarashi located in Saroruma, Tokoro District, Hokkaido. This house exemplifies contemporary Japanese residential design with thoughtful spatial organization and refined material expression. Igarashi's approach balances minimalist aesthetic principles with functional living requirements, creating a dwelling that harmonizes with its northern Japanese landscape setting. The project demonstrates the architect's signature attention to detail and innovative use of structural systems, making it a notable example of early 2000s Japanese domestic architecture for those interested in modern residential design.