X-Plane 10 Aichi D3A1 Val. The Aichi D3A was a World War II carrier-borne dive bomber of the Imperial Japanese Navy. It was the primary dive bomber in the Imperial Japanese Navy, and participated in almost all actions, including the attack on Pearl Harbor. The Aichi D3A was the first Japanese aircraft to bomb American targets in World War II, commencing with Pearl Harbor and U.S. bases in the Philippines, such as Clark Air Force Base. During the course of the Second World War, the Val dive bomber sank more Allied warships than any other Axis aircraft. despite being considered somewhat obsolescent when the war started. Credit goes to Bernard Augras for the use of his pilots. By Philippe Gastebois.