The Imperial Japanese Navy Air Service was the aerial warfare branch of the Imperial Japanese Navy from 1919 until the end of World War II in 1945. It played a crucial role in naval operations, providing air support for fleet actions and conducting reconnaissance missions. The service was known for its innovative aircraft designs, including the famous Mitsubishi A6M Zero fighter. During its existence, the air service participated in significant conflicts, such as the Second Sino-Japanese War and the Pacific Theater of World War II. It was instrumental in early successes, including the attack on Pearl Harbor, but faced challenges as the war progressed, leading to its eventual decline.