High Quality Content by WIKIPEDIA articles! The Nakajima Ki-115 Tsurugiwas a one-man kamikaze aircraft developed by the Imperial Japanese Army Air Force in the closing stages of World War II in late 1945. The Imperial Japanese Navy called this aircraft T ka The aircraft's intended purpose was to be used in kamikaze attacks on United States shipping and the invasion fleet expected to be involved in the invasion of Japan, Operation Downfall, which in the end did not take place.Because the Japanese High Command thought that Japan did not have enough obsolete aircraft to use for kamikaze attacks, it was decided that huge numbers of cheap, simple suicide planes should be constructed quickly in anticipation for the invasion of Japan.