北海道's number one great river "Ishikari River"'s curved part was, in the Meiji era, by the river's flood, naturally short-circuited and formed as a crescent lake. After that, based on flood control plans, from Showa 16, a new waterway was excavated, and it has reached the present.

As if to announce the end of Hokkaido's long winter, swans flying in is, annually after entering March. In Honshu's lakes and marshes spending winter, distant Siberia they aim for. Fukuraji-numa is a long journey's important resting place.
In the distance what is visible is, Shintotsukawa Town's symbolic mountain "Pinneshiri".
Swans are, in the rice paddies where snowmelt has advanced, pecking at the rice husks spilled during the autumn harvest.