
The 1st Air Fleet also known as the Kidō Butai, was a name used for a combined carrier battle group comprising most of the aircraft carriers and carrier air groups of the Imperial Japanese Navy (IJN), during the first eight months of the Pacific War.

The 25th Air Flotilla was a combat aviation unit of the Imperial Japanese Navy Air Service (IJNAS) during the Pacific Campaign of World War II.

The Fifth Carrier Division was an aircraft carrier unit of the Imperial Japanese Navy's First Air Fleet. At the beginning of the Pacific Campaign of World War II, the Fifth Carrier Division consisted of the fleet carriers Shōkaku and Zuikaku. These two ships participated in the attack on Pearl Harbor, using their aircraft to strafe airfields and provide fighter protection for bombers. On the way back to Japan after Pearl Harbor, the 5th Carrier Division was used to protect the main fleet from American submarines suspected of following the fleet.

The First Carrier Division was an aircraft carrier unit of the Imperial Japanese Navy's First Air Fleet. At the beginning of the Pacific Campaign of World War II, the First Carrier Division consisted of the fleet carriers Akagi and Kaga. The division participated in the Attack on Pearl Harbor and Indian Ocean Raid. After Akagi and Kaga were sunk at the Battle of Midway in June 1942, carriers Shōkaku, Zuikaku, and Zuihō were redesignated as the First Carrier Division.

The 4th Carrier Division was a seaplane tender and aircraft carrier unit of the Imperial Japanese Navy's Combined Fleet.

The Second Carrier Division was an aircraft carrier unit of the Imperial Japanese Navy's First Air Fleet. At the beginning of the Pacific Campaign of World War II, the Second Carrier Division consisted of the fleet carriers Sōryū and Hiryū. Both carriers were sunk at the Battle of Midway in June 1942 and were replaced by Jun'yō and Ryūjō.

The 3rd Carrier Division was primarily a seaplane tender unit of the Imperial Japanese Navy's Combined Fleet.