Late in World War II, the Dai-ichi Kaigun Koku Gijitsusho (1st Naval Air Technical Arsenal) at Yokosuka, Japan, designed the MXY7-K1 to teach less experienced pilots to fly the Model 11 "Ohka" (Cherry Blossom) kamikaze suicide rocket bomb. The Ohka was carried to the target under a G4M "Betty"