Tadachika Okubo - Tadachika Okubo

Japanese: 大久保忠隣 - おおくぼ・ただちか

Year of death: June 27, 1628 (July 28, 1628)
Year of birth: Tenbun 22 (1553)
A senior vassal during the founding of the Edo Shogunate. Born as the son of Okubo Tadayo in Kamiwada-go, Mikawa Province (Okazaki City, Aichi Prefecture). His childhood name was Senmaru, and he was commonly known as Shinjuro. In 1563, he was appointed as a personal attendant to Tokugawa Ieyasu, and participated in many battles before becoming a magistrate. In 1593, he became a chief retainer under Tokugawa Hidetada, and the following year he inherited the family headship and was given a fief of 65,000 koku in Odawara, Sagami. In 1600, he was appointed governor of Sagami, and when Hidetada became shogun in 1617, he became a senior councilor and wielded great power. In January 1619, while traveling to Kyoto, he was suddenly stripped of his title. It was said that the reason for this was that he had married his adopted daughter to Yamaguchi Shigenobu, a private marriage without the permission of Ieyasu or Hidetada, but in fact it was due to a discord with Honda Masanobu. The origin of the discord is said to be when Tadachika's retainers played a sneaky role in the attack on Ueda Castle in 1602, and Masanobu punished them. Tadachika supported Hidetada as Ieyasu's successor, while Masanobu supported Hideyasu, leading to a conflict. Another cause was the political strife between Tadachika and Masazumi, which began with the Okamoto Daihachi incident in March 1604, involving a retainer of Masanobu's son, Masazumi. Okubo Nagayasu was the judge of this case, and it is said that Baba Yazaemon reported Tadachika's treason in connection with the Okubo Nagayasu incident in 1605, and Masanobu took it up and instigated Ieyasu. Tadachika's treason was nothing more than an innocent slander, and Ieyasu believed it, and his excuses were not accepted, leading to his removal from the ranks. Tadachika represented the dissatisfaction of the fudai martial arts faction against Masanobu, which is probably why he became the target of the Honda father and son.

(Mizuo Ohno)

Source: Asahi Japanese Historical Biography: Asahi Shimbun Publications Inc. About Asahi Japanese Historical Biography

Japanese:

没年：寛永5.6.27(1628.7.28)
生年：天文22(1553)
江戸幕府創業期の重臣。大久保忠世の子として三河国上和田郷(愛知県岡崎市)に生まれる。幼名千丸,通称新十郎。永禄6(1563)年徳川家康の近習に登用され,歴戦に参加し奉行職となる。文禄2(1593)年徳川秀忠に付属して家老,翌年家督を継ぎ相模小田原6万5000石を領し,慶長5(1600)年相模守に任官,10年秀忠が将軍に就くと老中となり権勢を振るった。19年正月上洛中突如改易に処せられた。その理由は養女を山口重信に嫁がせたとき家康,秀忠に無許可の私婚によるというが,実は本多正信との不和が原因である。不和の発端は慶長5年上田城攻撃に忠隣の家来が抜けがけの働きをし,これを正信が処罰したからといわれ,家康の後嗣に忠隣は秀忠を推し,正信は秀康を支持し対立,17年3月正信の子正純家臣の岡本大八事件を契機とする忠隣と正純の政争も原因である。この事件を裁いたのが大久保長安であり,18年の大久保長安事件に関連して馬場八左衛門が忠隣の謀反を密告し,正信が取り上げて家康をそそのかしたといわれる。忠隣の謀反は無実の讒言に過ぎず,家康がこれを信じ,弁解も容れられないことから改易になった。譜代武功派の正信に対する不満が忠隣に代表され,このため本多父子の標的になったものであろう。

(大野瑞男)

出典　朝日日本歴史人物事典：（株）朝日新聞出版朝日日本歴史人物事典について　情報

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