Wachūsan Honpo (和中散本舗, Wachūsan Honpo) is an early Edo period pharmacy located on the former Tōkaidō highway in the city of Rittō, Shiga Prefecture, Japan. The building was designated an Important Cultural Property of Japan (ICP) in 1954 and a National Historic Site of Japan in 1949. The ICP designation covers the main house and shop, main gate and the shoin residence