The day is the 10th anniversary of the creation of the Hakko Kamikaze Squadron (September 21, 1944 in the Japanese calendar).
The day is the 131st anniversary of the Battle of Shiroyama (September 24, 1877).
He is a great-great-grandson of Okubo Toshimichi, who lead the Imperial Japanese Army at the battle of Shiroyama. And it is obvious that the appointment commemorated the victory.
A PC of the editor of "Japan's Conspircy" had a glitch on September 22. He bought a new PC, but the trouble takes place again.