Sankei-en (三溪園, Sankei Garden) is a traditional Japanese-style garden in Naka Ward, Yokohama, Japan, which opened in 1906. Sankei-en was designed and built by Tomitaro Hara (原富太郎) (1868–1939), known by the pseudonym Sankei Hara, who was a silk trader. Almost all of its buildings are historically significant structures bought by Hara himself in locations all over the country, among them Tokyo, Kyoto, Kamakura, Gifu Prefecture, and Wakayama prefecture. Ten have been declared Important Cultural Property, and three more are Tangible Cultural Properties of Japan designated by the City of Yokohama. Badly damaged during World War II, the garden was donated in 1953 to the City of Yokohama, which entrusted it to the Sankeien Hoshōkai Foundation (三溪園保勝会, Sankeien Hoshōkai).