The Imperial Japanese Army Air Service was the aerial warfare branch of the Imperial Japanese Army from 1919 until the end of World War II in 1945. It played a crucial role in Japan's military operations, providing air support for ground troops and engaging in aerial combat. The service operated various aircraft, including fighters, bombers, and reconnaissance planes. During its existence, the air service evolved significantly, adopting advanced technologies and tactics. It participated in key conflicts, such as the Second Sino-Japanese War and the Pacific Theater of World War II, contributing to Japan's military strategy and operations across Asia and the Pacific.