Zushi Seaside House is a residential accommodation facility completed in 1986, designed by architect Eiji Musha of Shin Sekkei. Located in Zushi, Kanagawa Prefecture, this building exemplifies late 1980s Japanese residential architecture. Situated in the coastal area at 3-6-17 Shinjuku, Zushi, the structure was created to serve as a welcoming retreat space while harmonizing with its seaside environment. The design reflects the architectural philosophy of its era, incorporating contemporary residential principles. This property represents an interesting example of period-specific domestic architecture for those studying Japanese building design and coastal residential development during the Showa period.