|Operators:||Imperial Japanese Navy|
|Displacement:||15,400 long tons (15,647 t) standing|
|Length:||138.68 m (455 ft 0 in) Lpp|
|Beam:||17.68 m (58 ft 0 in)|
|Draught:||8.08 m (26 ft 6 in)|
|Speed:||12 knots (14 mph; 22 km/h)|
|Capacity:||8,000 tons for oil|
The Ondo class was initially planned in 1920 as the six of the Kamoi-class oilers under the Eight-eight fleet final plan. However, of the Kamoi-class oilers, only the Kamoi was completed, due to the conclusion and signing of the Washington Naval Treaty. The other five vessels were then re-planned to the Modified Notoro class.
Service in peacetime
They devoted themselves to importing crude oil from North America and Southeast Asia. The crude oil which the Ondo class and the Notoro class carried to Japan was 388 sorties; 3,000,000 tons, until 1941.
Service in Pacific War
They were not able to accompany heo fleet, because they were low speed. They were engaged in supply duties at naval bases.
Ships in class
|Ondo (隠戸?)||Kawasaki-Kōbe Shipyard||15-03-1922||21-10-1922||12-03-1923||Sunk by air raid at Manila Bay 13-11-1944.|
|Hayatomo (早鞆?)||Kure Naval Arsenal||14-03-1922||04-12-1922||18-05-1924||Scuttled off Singapore, 1946. Decommissioned on 03-05-1947.|
|Naruto (鳴戸?)||Yokosuka Naval Arsenal||11-04-1922||30-01-1923||30-10-1924||Heavy damaged by air raid at Rabaul, 14-01-1944 and grounded. Damaged once again 02-03-1944. Scuttled 15-03-1944.|
|2 vessels||Re-planned as an icebreaker and food supply ship.|
Naruto on 29 May 1932 at Yokosuka
- "Rekishi Gunzō"., History of Pacific War Vol.37, "Support vessels of the Imperial Japanese Forces", Gakken (Japan), June 2002, ISBN 4-05-602780-3
- Ships of the World special issue Vol.47, Auxiliary Vessels of the Imperial Japanese Navy, "Kaijinsha". (Japan), March 1997
- The Maru Special, Japanese Naval Vessels No.34, "Japanese auxiliary vessels", "Ushio Shobō". (Japan), December 1979
- Senshi Sōsho Vol.31, Naval armaments and war preparation (1), "Until November 1941", Asagumo Simbun (Japan), November 1969