We mostly heard about Japanese Kamikaze attacks on Warships but they also used this tactic on american bombers too.During 7th of November 1944 Japanese Kawasaki Ki-61's were modified to reach high altitude capability so its armament was updated with .50 cal machine guns to handle big american bombers, but it still remained capable with a 580 km/h (313 km) maximum speed. The cannon armament was needed to counter the high altitude Allied bombers, but which proved to be difficult to shoot down with only 12.7 mm (.50 in) machine guns because B-29 can take a beating and still fly also it had remote controlled machine guns too. Japanese ramming attacks became frequent and desperate at the late 1944 .In order to conduct attacks on high flaying b-29, japanese aircraft's were stripped of their fuselage armament and protective systems in order to attain the required high altitudes. Once japans intercept b-29 with great difficulty only option is ramming. Although the term "kamikaze" is often used to refer to the pilots undertaking these attacks, the word was not used by the Japanese military. several number of Ki-61s were also used in Tokkotai (kamikaze) missions, launched toward the end of the war. The tactic of using aircraft to ram American Boeing B-29 “Superfortresses” was first recorded in late August 1944, when B-29s from Chinese airfields attempted to bomb the steel factories at Yawata. Sergeant Shigeo Nobe of the 4th Sentai intentionally flew his Kawasaki Ki-45 into a B-29; debris from the explosion severely damaged another B-29, which also went down. Other attacks of this nature followed, as a result of which individual pilots determined it was a practicable way of destroying B-29s. I Also heard that german Luftwaffe pilots also did ramming attacks on american bombers. i have limited information about that. Does anybody have more information. More about Japanese Ramming B-29 Prashan Shan's answer to Why did Japanese pilots ram their planes into B-29s? - Quora Aerial ramming - Wikipedia Thanks.