Agano River
Akimoto Lake’s water flows in from Nagase River, and forms a delta at its lower section which pours into Lake Inawashiro. Water then flows from Lake Inawashiro into Nippashi River, from which it connects to Agano River at Kitakata City. Because of this path that the water takes, Akimoto Lake is designated under the River Act as part of the Agano River water system, and managed as a class-1 water system by Fukushima Prefecture.