1441 (Kakitsu 1, 9th month): The murderers of Yoshinori kill themselves.
1443 (Kakitsu 3): A Japanese-Korean diplomatic agreement (sometimes called the "Kakitsu treaty") regularized an initial plan for mitigating the damage caused by pirates (wakō). The bilateral agreement assigned the responsibility for monitoring ships from Japan en route to Korea. The Sō clan of Tsushima han (Tsushima Island) were given the right to license ships sailing west beyond Tsushima; and this also encompassed the opportunity to profit from whatever fees the Sō might charge.
August 16, 1443 (Kakitsu 3, 21st day of the 7th month): Shōgun Yoshikatsu died at the age of 10. He liked riding horses very much; but he was gravely injured in a fall from a horse. This was the cause of his death. He had been shōgun for only three years. His 8-year-old brother, Ashikaga Yoshinari, was then named shōgun.
October 16, 1443 (Kakitsu 3, 23rd day of the 9th month): An armed group of rebels penetrated the palace defenses. A fire was started and one of the men sought to kill Go-Hanazono, but the emperor escaped. However, the intruders managed to steal the Three Sacred Treasures – the mirror, the sword and the jewel. Later, a guard found the mirror and a priest found the sword, but the location of jewel was not known until the 8th month of Bunnan gannen.