Kumagawa Maru (jp:球磨川丸) was a transport of the Imperial Japanese Navy during World War II.

She was laid down on 23 January 1933 at the Nagasaki shipyard of Mitsubishi Shipbuilding & Engineering for the benefit of Toyo Steamship Company Ltd of Tokyo.

[1][2] She was launched on 5 December 1933, completed on 31 March 1934, and given the name Nichiyo Maru (日洋丸).

[3] On 27 August 1941, she was requisitioned by the Imperial Japanese Navy and assigned to the Maizuru Naval District with Captain Shiro Yoshida as commanding officer.

[2] Her conversion commenced at the Osaka Iron Works and was completed on 1941 October 26.