Aki River

The Aki River (also, the Akikawa River) is a river in Japan. The Aki River flows west of Tokyo Metropolitan Area. It is a major tributary of the Tama River, the largest. The Japanese name, 秋川, means "Autumn River."
The words "Akigawa River" sound a bit odd, as "kawa" and "gawa", 川, are Japanese words for "river", so "Aki River" makes more sense, or simply "Akigawa", perhaps "Akikawa".
The river's source.
The Akigawa has a north fork and a south fork, but the river's source is in the Chichibu Tama Kai National Park.
Course of the river.
The Akigawa flows through the towns of Akiruno and Hinohara, and through Kanagawa and Tokyo Prefectures.
Recreation area.
The river's gorge is a popular recreation area.