It is the second largest natural swamp in Saitama Prefecture.
It has a circumference of about 2 km and a depth of 8 m at its deepest point.
In addition, a biotope has been set to improve and protect the natural environment.
Seasonal flowers bloom around the marsh, and you can enjoy a pleasant walk or stroll throughout the year.
Various events such as "Koinobori" (carp streamers) from the end of April to May and "Illuminations" in December are held.
It is also a famous fishing spot and receives many anglers throughout the year.