Lake Koshigaya is a scenic body of water located in Koshigaya City, Saitama Prefecture, Japan. It is known for its beautiful surroundings and serves as a popular recreational area for both locals and visitors. The lake is part of the Koshigaya Nature Park, which offers walking trails, picnic spots, and opportunities for birdwatching. The lake is also home to various aquatic life and is a habitat for numerous species of birds. Activities such as fishing and boating are enjoyed by many, making it a vibrant spot for outdoor enthusiasts. Nearby attractions include Koshigaya Lake Town, a shopping and entertainment complex.