25th Air Flotilla

The 25th Air Flotilla (第二五航空戦隊,) was a combat aviation unit of the Imperial Japanese Navy (IJN) during the Pacific Campaign of World War II. The flotilla, mainly consisting of land-based bombers, fighters, and reconnaissance aircraft, reported to the IJN's 11th Air Fleet. As originally organized, the flotilla's core units were the 4th Naval Air Group, Tainan Naval Air Group, and Yokohama Naval Air Group. The 4th flew bombers, the Tainan fighters, and the Yokohama reconnaissance aircraft.

The 25th Air Flotilla, under the command of Rear Admiral Sadayoshi Yamada, was deployed to Rabaul, New Britain on 29 March 1942. From this location, the unit supported Japanese military operations in the New Guinea and Solomon Islands Campaigns. During these campaigns, the unit was augmented by aircraft from other flotillas. The operational title for this hybrid organization was the 5th Air Attack Force. The organization took heavy losses in air combat over Guadalcanal.