While not included in the Sakefuneishi Archeological Site, 2 pieces of stonework were found on the banks of Asuka-gawa River approximately 400 meters away bearing grooves that seem to have been used to run water in whereby they are named Sakefuneishi as well.
酒船石遺跡には含まれないが、約400m離れた飛鳥川畔で2個の石造物が見つかっており、これも水を流したような溝などがあり同じく酒船石と名付けられている。