Ondo-class oiler
# Ondo-class oiler

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.

## 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 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.

## 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 the fleet, because they had low speed. They were engaged in supply duties at naval bases.

## Ships in class

| Ship | Builder | Laid down | Launched | Completed | Fate |
| - | - | - | - | - | - |
| 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. |

## Photo

* Hayatomo
* Naruto on 29 May 1932 at Yokosuka
