I felt their sucide attackers'munen. The crews of 160 were lost on the day inculding carried Betties and escorted fighters.
Who approved a sucide bomb plan that a Betty hung it under the belly? Totsuka Michitaro was a Koku honbucho of IJN from Dec 1942 to the end of Apr 1945. The desing was done in air arsenal of IJN in Kanagawa and University of Tokyo. The propulsion was a liquid rocket engine in the original proposal. The photo shows a rocket engine for another trial rocket plane.
A head of IJNGS was very interested in an idea of airborne sucide weapon from Genda's explanation. The report was held in a meeting on 5th Aug. Oikawa, a new chief of IJNGS approved the weapon development. IJNGS requested Kouku HQ to make the weapon. The Koku HQ ordered Koku gijyutu-shou to make 100 trials till the end of Oct and called them code name Marudai buhin.
The 721st Kokutai was established mainly for air suicide attack. It was equipped with Betty, Zero and Ouka (MXY7). The troop used a gliding manned bomb called marudai buhin or Ouka. However, Mother aircarft carrying the winged bomb was too slow to access near targets. The first operation failed on 21st Mar 1945. So the 721st Kokutai transferred pilots of escort fighters to sucide pilots. They rode Zeros loaded a 500kg bomb. IJN began a bomber pilot to ride a figher carrying a bomb because shortage of fighter pilots in the Mariana battle. IJN called a bomb fighter Bakusen. The 721st Kokutai started Bakusen sucide on 2nd Apr in the Okinawa Battle. In the results, one hit Hancock on 7th Apr, 2 hit Kidd and Missouri on 11th Apr, 4 hit Hazelwood, Haggard and Harry F. Bauer on 29th Apr, 2 hit Bunker Hill on 11th May, one hit Enterprise.
IJN ordered Okamura a chief for preparing Marudai buhin troop on 15th Sep at Yokosuka. IJN ordered Okamura a commander of 721st Kokutai at Hyakuri-ga-hara on 1st Oct. The 721st Kokutai moved to Kami-no-ike on 7th Nov. Crews of MXY7 began gliding from a Betty at 3,000m height on 13th Nov. I think 721st Kokutai judged operational release altitude was not 6,000m but 3,000m. A Betty had to come near an enemy warship 30km at least to attack.
Naito, p39, p41-42, p91, p101, p103-104
The Air Museum Planes of Fame
The table shows MXY7 crews' rank and loss in the 10 operations. 18 Betty flew in the first operation. 3 of 18 were leader aircraft and equipped with a radar each. But all the 18 Betty were lost. A betty of the 6th operation only returned base. 78% of all the crews were petty officers. A MXY7 sank USS Mannert L. Abele(DD-733) on 12th Apr. This was the first and the last warship that MXY7 sank.
IJN failed to destroy USN task forces in the Okinawa Battle. The typical example was operation of MXY7 from 21st Mar to 22nd Jun. GF tried trainers as sucide to attack destroyers and transports. GF appointed 2 trainning student of Tokushima Kokutai and Kouchi Kokutai to sucide attack. It meant that IJN would intercept convoys in Kyushu on Nov 1945. 2 trainers sank USS Drexler and killed 158 men on 28th May.
5th air fleet
The 5th air fleet HQ telegrammed Ugaki's message at 1924 on 15th Aug 1945.
The telegram said, 'koukoku' 4 times. Koukoku means Mikado's land. Ugaki thought he should die for Mikado naturally. He said, 'Shi ni basyo wo ataetekure.' It means I want my stage of death.
While examination department of Imperial Japanese Army Air Force did not adopt sucide aircraft Turugi(Ki-115) because of a lot of defects actually, though IJA had ordered production of them which Nakajima designed and made a few hundred.
2 IJA officers did sucide attack with a woman each in Manchuria on 19th Aug. The aircraft were Ki-36 or Ki-79 trainer. Name of one pair were Tanifuji Testuo and his wife asako. The other were Okura Iwao and Sumiko. 9 aircraft of the last IJN sucide attack was called Shinshu Fumetsu Tokubetsu Kougeki-tai(Sucide Attack).
Ministry of Education
After all, no one was resonsible for the immoral weapon and the unhuman operation. People of Japan allowed them to live on peace after the war. And some people incldinig Koizumi Jyunichiro praise the operation. Certainly almost sons of rulers never died by sucide attacks. Most of people praise someone does a sucide for their family, organization, group, and our nation even now. This is our dark crude property for 1,000 years long. Boys and girls are enthusiastic that a hero or heroin of mangas or TV dramas does a sucide for their families or organiztion.
Some princes of Mikados were also driven to sucides for their clans as a result of power imbalance among rulers before modern times.