The were a class of three oilers of the

Imperial Japanese Navy The Imperial Japanese Navy (IJN; Kyūjitai: Shinjitai: ' 'Navy of the Greater Japanese Empire', or ''Nippon Kaigun'', 'Japanese Navy') was the navy of the Empire of Japan from 1868 to 1945, Potsdam Declaration, when it was dissolved followin ...

(IJN), serving during the 1920s and

World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...

Construction

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 Washington Naval Treaty, also known as the Five-Power Treaty, was signed during 1922 among the major Allies of World War I, Allies of World War I, which agreed to prevent an arms race by limiting Navy, naval construction. It was negotiated at ...

. The other five vessels were then re-planned to the ''Modified Notoro'' class. Out of the five ships, one became the icebreaker , while the other become the food supply ship . Therefore, only three ships were built as ''Modified Notoro''-class (''Ondo''-class) oilers.

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 carried to Japan was 388 sorties; 3,000,000 tons, until 1941.

Service in Pacific War

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

Ships in class

Photo

Image:Japanese oiler Hayatomo.jpg, ''Hayatomo'' Image:Japanese oiler Naruto in 1932.jpg, ''Naruto'' on 29 May 1932 at

Yokosuka is a city in Kanagawa Prefecture, Japan. , the city has a population of 373,797, and a population density of . The total area is . Yokosuka is the 11th-most populous city in the Greater Tokyo Area, and the 12th in the Kantō region. The city i ...

Bibliography

*, ''History of Pacific War Vol.37, "Support vessels of the Imperial Japanese Forces"'',

Gakken is a Japanese publishing company founded in 1947 by Hideto Furuoka, which also produces educational toys. Their annual sales are reported at ¥ 90 billion ($789 million US). Gakken publishes educational books and magazines and produces othe ...

(Japan), June 2002, *Ships of the World special issue Vol.47, ''Auxiliary Vessels of the Imperial Japanese Navy'', (Japan), March 1997 *The Maru Special, ''Japanese Naval Vessels No.34, "Japanese auxiliary vessels"'', (Japan), December 1979 *

Senshi Sōsho The , also called the , is the official military history of Imperial Japan's involvement in the Pacific War from 1937 to 1945. The task of compiling the official account of the Japanese involvement in World War II began in October 1955 with the ope ...

Vol.31, ''Naval armaments and war preparation (1), "Until November 1941"'', Asagumo Simbun (Japan), November 1969

External links

Hayatomo
{{DEFAULTSORT:Ondo-class oiler World War II naval ships of Japan World War II tankers Oilers Auxiliary replenishment ship classes