Old M Cabin is a residential and office building completed in 1999, located in Nagaizumi Town, Shizuoka Prefecture. Designed by Michio Kinoshita and Workshop, this structure represents a thoughtful approach to residential design from the late 1990s. The building successfully integrates living spaces with office functionality, reflecting contemporary architectural practices of its era. Its design demonstrates careful consideration of how domestic and professional environments can coexist harmoniously. The cabin exemplifies the architectural philosophy of its designers, offering insights into residential design principles and spatial planning from the turn of the millennium.