Ota Dokan Was born in 1432 as a child of Shugodai Sagami and Shibo Ota.
The Ota family is the Ogiya Uesugi family among the Uesugi family who have inherited the Kanto region for generations. Was the butler of. Mr. Uesugi was originally one of the tributaries from Mr. Fujiwara, Shigefusa Fujiwara . Goes from Kyoto to Kamakura and [ Uesugi ] It started with giving me a surname.
Mr. Uesugi, who had inherited the Kanto region as an assistant to Kamakura for generations, was Yamauchi, Inukake, Ogiya, Takuma Uesugi during the Nanbokucho period. Four Houses The Yamauchi / Inukyu Uesugi family monopolized the Kanrei position.
1416 Inu Susumu Uesugi Family Mr. Uesugi rebelled against Mr. Koga Kubō and Mr. Ashikaga Mochiuji [ Zenshu Uesugi's Ran ] Will be raised. In this turbulence, Nobumitsu Takeda and Yajiro Oyamada of Kai also sided with Mr. Uesugi, but they were defeated and the Uesugi family was destroyed.
As a result, the Yamanouchi-Uesugi family became a soke and monopolized the Kanrei position.
Norizane Uesugi of the Soke Yamanouchi Uesugi family will be in the Kanto region, and Mochitomo of the Ogiya Uesugi family will be appointed as an assistant to the Kanto region and ordered to protect Sagami. Mr. Ota served as the guardian of this Sagami guardian, Norizane Uesugi.
The war in the Kanto region due to the Kyotoku turbulence
1454 An incident occurred in which Kantō Kubō and Ashikaga Shigeuji assassinated Kanto Kanrei and Uesugi Noritada, which strengthened the conflict between the Uesugi Kanrei and Kantō Kubō and Ashikaga. This confrontation between Mr. Ashikaga and Mr. Uesugi became muddy and continued until 1482, and the war in the Kanto region [ Kyotoku Incident ] Is called.
In this war, the Ota Dokan played an active role in the Ota Uesugi family, who grew into a Sagami Sengoku daimyo who dominated Nanasawa Castle and the Kasuyakan, and overwhelmed the Soke family.
1456 Ota Dokan At the age of 25, his father gave him the reign.
At this time, Dokan built Kawagoe Castle in order to counter Mr. Ashikaga Shigeuji, who entered Furukawa Castle and called him Koga Koga. I did.
On May 1, 1457, Edo Castle was completed and moved from Shinagawa.
As the conflict with Koga Koga continues, Kageharu Nagao revolts over the succession of the Yamanouchi-Uesugi family's Chancellor, and Uesugi Akisada is defeated and withdraws to Ueno.
Around this time, Dokan Ota had a firstborn son, Sukeyasu Ota, with his Seishitsu. He also intervened in the Imagawa clan's reign in Suruga and supported Norimitsu Imagawa, the blood of the Imagawa clan. Meanwhile, Dokan learned of the Nagao Keiharu turbulence in 1477 . Defeat Oyamada Castle, Shakujii Castle, and Nerima Castle to remove the threat of Edo Castle.
January 1478 In, Koga Furukawa and Ashikaga Shigeuji applied for a consensus with the Yamanouchi-Uesugi family, ending the Kyotoku Incident. However, Sadamasa Uesugi, the lord of Dokan Ota, was dissatisfied with the peace with Koga Furukawa, who was led by the Yamauchi family, so Sadamasa Ogiya and Uesugi Yamauchi are in conflict.
Assassination of Dokan Ota
The fame of Dokan Ota, who showed an activity to settle the war in the Kanto region by himself for 30 years, surpassed his master, Uesugi Sadamasa. Sadamasa himself wouldn't have enjoyed it either.
Furthermore, as the Ogiya Uesugi family gained power to surpass the Soke and Yamauchi families, the Yamauchi and Ogiya families were in conflict with the Yamauchi family, who rumors that Dokan was trying to take over the main family. I joined hands to eliminate Dokan.
Ota Dokan saved the Uesugi family's crisis with his angry waves, but he was wary of the disturbing movements of his lord, Uesugi Sadamasa, and his firstborn, Sukeyasu, was held as a hostage in 1485 . strong> I entrusted it to Koga Furukawa, who was hostile to.
1486 , Ota Dokan, who was in Edo Castle, was called by Uesugi Sadamasa and was assassinated.
At the time of his death, Dokan was [ our destruction ], Which is said to be [ There is no future for the Ogiya Uesugi family when I'm gone ] Is said to mean. He was 55 years old.
It seems that the assassination by the Ryouesugi family was planned because Yamauchi Uesugi Akisada was on the battlefield to control the village of Ogose and Kosugi, the retreat of Dokan's father, Ota Doshin.
After that, Ota Sukeyasu became the successor to Edo Castle, but 1486 When dropped by Sadamasa Uesugi, Sukeyasu escaped to Kai. In 1505, Asayoshi Ogiya Uesugi was forced to live in exile for about 20 years until he became the lord of Edo Castle and returned to his vassals.
Later, Sukeyasu's second son, Ota Suketaka Steals the castle from Edo castle owner Uesugi Tomooki, Hojo Ujitsu Edo Castle will be under the control of Mr. Hojo.
Construction of Edo Castle
Edo Castle is said to have started when Mr. Edo settled there at the end of the Heian period.
The full-scale castle was built by Dokan in 1457 during the Kyotoku Rebellion.
At that time, it had a triple structure of Honmaru, Nakajo, and Sotojo, and was surrounded by cliffs and moats, which were connected by gates and bridges. A residence called Shizukamasaruken was set up in the main circle, and a cabinet * was built behind it. * A cabinet is a high-rise building such as a palace or a view.
There is a plum grove on the north side of Edo Castle, where [ Sugawara no Michizane ] Was enshrined.