Matsuura River
The source of the river is located under Mount Seira (青螺山, 599 m high), in the city of Takeo . The river flows north through the mountains, the Tanomi (鳥海川) river flows into it there, as well as the Kyuragi River (厳木川) near Ochi village. Below Ochi, Matsuura flows through the plain, merges with the Tokusue River (徳須恵川) and flows into the Karatsu Bay of the Sea of Japan  in the city of Karatsu.