Koshigaya is a city/town with a medium population in the state/region of
Saitama,
Japan which is located in the continent/region of
Asia.
Cities, towns and places near Koshigaya include Ōsawa, Yoshikawa, Sōka and Hatogayamachi.
The closest major cities include Matsudo, Kashiwa, Ageo and Ichikawa.