Miyajima-numa (宮島沼) is a near-circular shallow freshwater oxbow lake located some 45 kilometres (28 mi) northeast of Sapporo on the Japanese island of Hokkaidō. Situated in the Ishikari peatlands and formed by the meandering Ishikari River that flows a short distance to the west, with the Kabato Mountains rising behind, there is no river inflow; instead it is fed by rainwater and melting snow, while being drawn on for the irrigation of the surrounding rice fields, developed since the Taishō era. A major stopover for migrating Anatidae, in particular fifty to sixty thousand greater white-fronted geese (Anser albifrons, a national Natural Monument), it has been designated a Ramsar site, as a wetland of international significance, and a Special Wildlife Protection Area. Formerly known simply