Japanese fleet oiler Hayasui

The Hayasui (速吸) was a Japanese fleet oiler (hybrid tanker/carrier) of the Imperial Japanese Navy (IJN), serving during World War II.

Construction
Hayasui was completed as one of the Kazahaya class fleet oilers. After lack of reconnaissance planes was identified as a contributing factor to defeat of the IJN at the Battle of Midway, aviation facilities were added to Hayasui for accompanying the carrier task force. The IJN added the function of food supply ship to Hayasui to improve carrier task force endurance following experience at the Battle of the Santa Cruz Islands.

Service

 * 24 April 1944 : Completed.
 * May 1944 : Sailed to Tawi-Tawi for Operation A.
 * 5 May 1944 : Collided with submerged submarine I-155.
 * 19 to 20 June 1944 : Participation to the Battle of the Philippine Sea and damaged.
 * 10 August 1944 : Repairs were completed for convoy Hi-71 departure from Moji to Singapore.

Fate

 * 03:20, 19 August 1944 : Hayasui was torpedoed (2 hits) by USS Bluefish at west of Vigan City.
 * About 05:00 : Explosion and sunk at 17.56667°N, 119.4°W.
 * 10 October 1944 : Decommissioned.