Losing both parents at the age of three, Morita was cared for by his brother Osamu and educated at a Catholic school.
[10][11][12] On 21 and 22 November 1970, supplies were bought, and Morita asked Hiroyasu Koga to stand in for him if he should fail to behead Mishima properly.
[8][10][11] On the morning of 25 November, the group drove to the Japan Self-Defense Force's Ichigaya garrison on the pretext of a friendly visit.
At noon, Mishima began to make a speech from the balcony to assembled troops, but his words were drowned out by helicopters.
"[11][13][b] Nevertheless, after Mishima's seppuku, Morita knelt and stabbed himself in the abdomen and Koga again performed the kaishakunin duty.