the Japanese turned to a perceived way to put unskilled pilots to maximum use flying obsolete aircraft packed with high explosives, bombs and fuel as suicide pilots. Captain Motoharu Okamura, a distinguished Japanese military aviator and commander of the 341st Tateyama Kōkūtai (Air Group) in June 1944 is said to have first come up with the Kamikaze concept and develop training programs for attacking Allied shipping.
Anywhere up to 4,000 Kamikaze pilots, mostly aged between 18 and 24 years old, senselessly died whilst leaving havoc and destruction in their wake during the final months of World War Two striking 474 Allied ships and killing 7,000 servicemen (a great expense in thousands of men and 2,500 aircraft for a relatively limited and wasteful 19% success rate per sortie according to Kamikaze: Japanese Special Attack Weapons 1944-45 by Steven J. Zaloga, Pg. 12). The first official organised Kamikaze attacks by the Japanese are said to have happened during the period of October 23rd – 26th, 1944 at the Battle of Leyte Gulf near the Philippines by 24 volunteer pilots of the 201st Navy Air Group, against a combined Australian and US naval force. The first major warship lost to a Kamikaze attack was the escort carrier USS St. Lo (CVE-63) struck by an Mitsubishi A6M Zero fighter at the Battle of Leyte Gulf on October 25th, 1944. Despite the battle ending in a resounding Allied victory, the relative success of this small Kamikaze group lead the Japanese commanders to support further attacks (the Japanese Imperial Army also conducted Kamikaze attacks during these final months of the war)
The Yokosuka MXY7 Ohka was first tested by the Japanese in unpowered flight in October 1944 and powered flight in November 1944. The type was introduced into Imperial Japanese Navy operational service in 1945 and 852 were manufactured. The Model 11 type was the only one to be used operationally (around 755 of the overall total manufactured). Little training was required to fly the Ohka has it had limited controls and only one or two training flights were required before the poor Kamikaze pilot was ready to go on a one way mission (a two-seat and single seat training variant were developed – see below). It was seen as an inexpensive and easy to produce aircraft to strike back at the Allies (regardless of the loss of pilots) and with its speed and small size making it more difficult to hit, it was going to be more effective than using existing and dwindling numbers of obsolete aircraft that were already part of the Kamikaze war (this was not necessarily the case as it turned out).