Why did he kill the Minister of Tsubura?
In the second year of Emperor Richu, Minister Tsubura (Katsuragi Tsubura : his father was Tamada Sukune and his great-grandfather was Katsuragi Sotsubiko) took part in national affairs and donated the abundant rice and grains collected from Katsuragi no Agata to the imperial family. As a relative, he solidified his unshakable position.
However, in the 3rd year of Emperor Anko (around AD 456?), Prince Mayowa caused the assassination of Emperor Anko, and Prince Mayowa and Prince Kurohiko Sakaai, who were chased by Ohatsuse Wakatakeru no Mikoto (later Emperor Yuryaku), fled to the Tsubura Minister's mansion.
Ohatsuse Wakatakeru no Mikoto requests that the two be handed over, but the Tsubura Minister refuses the request.
At this time, I think that the Tsubura Minister crossed his mind to hand over the two to Ohatuse no Mikoto. However, even if the two were handed over, the fact that he had betrayed the imperial family members who had relied on him would be a sufficient reason to be punished later, especially in the case of Ohatsuse Wakatakeru no Mikoto, who would take advantage of such a thing, judging from his behavioral principles up until now.
If he dies with disgrace, he dies with honor. That was the decision of Minister Tsubura , and a slight resistance to Ohatsuse no Mikoto.
Tsubura no mikoto's mansion was besieged by Ohatsuse Wakatakeru no Mikoto‘s army, and Tsubura begged for forgiveness by presenting his daughter Karahime and Katsuragi's seven wards (seven his owned land in Katsuragi), but Ohatsuse was not forgiven, including the prince who fled, all burnt to death.
Prince Sakaai Kurohiko and Tsubura Minister were killed even though they had nothing to do with the assassination of Emperor Anko.
Behind this lies a bloody regime struggle.
Around the same time, there was a prince named Ichibe Oshiiwa, who was broad-minded and gentle in nature, and was in a powerful position to succeed to the throne, and Emperor Anko entrusted his future affairs.The backing was Minister of Tsubura (Mr. Katsuragi).
As Wakatakeru no Mikoto was driven by the need to weaken Prince Ichibe Oshiiwa because he wanted to take the throne.
Prince Ichibe Oshiiwa has a lot of Katsuragi blood (his father, Emperor Richu, and his mother, Kurohime no Mikoto, are both grandsons of Katsuragi Suguhiko).
Ohatsuse Wakatakeru no Mikoto's obsession with the succession to the imperial throne was beyond common sense, and there was no option to keep the Tsubura Minister alive from the beginning in order to isolate Prince Ichibe Oshiiwa. I think.
On the other hand, Tsubura Minister is a person who has risen to the highest rank among civilians called ministers. He can't be ignorant of political subtleties. I think he was convinced that the person Ohatsuse Wakatakeru no Mikoto really wanted to kill was not King Mayowa, but himself.
(According to the National History Taikei, Katsuragi Agata is said to have existed near Katsuragi Agata Shrine in the photo. Emperor Yuryaku obtained Karahime and Katsuragi Agata at this time, and Katsuragi Agata seems to have become a direct jurisdiction area of the imperial family.)
Katsuragi Agata Shrine: 15 minutes walk west from Kintetsu Shinjo Station. Taken on February 12, 2007