Ondo-class oiler

Naruto on 19 May 1932.
Class overview
Name	Ondo-class oiler
Builders	Kawasaki Shipbuilding Corporation Kure Naval Arsenal Yokosuka Naval Arsenal
Operators	Imperial Japanese Navy
Preceded by	Kamoi
Succeeded by	Kazahaya
Cost	2,250,000 JPY
Built	1922–1924
In commission	1923–1946
Planned	5
Completed	3
Cancelled	2
Lost	2
Retired	1
General characteristics
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)
Propulsion	Ondo 1 × triple-expansion engine 4 × Kampon water tube boilers single shaft, 3,750 shp Hayatomo and Naruto 1 × triple-expansion engine 4 × Miyahara model water tube boilers single shaft, 3,750 shp
Speed	12 knots (14 mph; 22 km/h)
Capacity	8,000 tons for oil
Complement	157
Armament	Ondo, 1923 2 × 140 mm (5.5 in) L/50 naval guns 2 × 76.2 mm (3.00 in) L/40 AA guns

The Ondo-class oilers (隠戸型給油艦, Ondo-gata kyūyukan) were a class of three oilers of the Imperial Japanese Navy (IJN), serving during the 1920s and World War II.

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.

Out of the five ships, one became the icebreaker Ōtomari, while the other become the food supply ship Mamiya. Therefore, only three ships were built as Modified Notoro-class (Ondo-class) oilers.

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.

They were not able to accompany the fleet, because they had low speed. They were engaged in supply duties at naval bases.

• 
  Hayatomo
• 
  Naruto on 29 May 1932 at Yokosuka

八八艦隊案 (ja)

• "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

• Hayatomo