Satomi clan - Satomiuji

Sengoku daimyo of the Boso region. Seiwa Genji. It is said that the clan began when Nitta Yoshishige's son, Yoshitoshi, lived in Satomi-go, Usui-gun, Kozuke Province (Usui-gun, Gunma Prefecture) and called himself the Satomi clan. In the late 15th century to early 16th century, Satomi Yoshizane pacified Awa Province and established his base in Tateyama. He then advanced into Kazusa and the Miura Peninsula, solidifying his position as a Sengoku daimyo. Yoshizane's great-grandson Yoshitaka and his son Yoshihiro allied with Ashikaga Yoshiaki, a descendant of the Koga kubo and known as Oyumigosho, to oppose the Later Hojo clan, but in 1538 (Tenbun 7) and 1564 (Eiroku 7), they fought against the Later Hojo clan at Konodai, Shimousa (Ichikawa City, Chiba Prefecture), but were defeated and retreated. After that, during the reign of Yoshiyasu, Toyotomi Hideyoshi granted them 92,000 koku of land in Awa Province, and after the Battle of Sekigahara (1600), Tokugawa Ieyasu granted them an additional 30,000 koku of land in Hitachi Province. However, during the reign of his son Tadayoshi, Okubo Tadachika was found guilty in connection with a corruption scandal involving Okubo Nagayasu, and was implicated in the crime. He was reduced to a fief of 30,000 koku in Hoki, and the family line died out without an heir.

[Kiyoshi Ito]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

房総(ぼうそう)地方の戦国大名。清和源氏(せいわげんじ)。新田義重(にったよししげ)の子義俊(よしとし)が上野国(こうずけのくに)碓氷(うすい)郡里見郷（群馬県碓氷郡）に住して里見氏を称したのに始まると伝えられ、15世紀後半～16世紀初頭に里見義実(よしざね)が安房国(あわのくに)を平定し、本拠を館山(たてやま)に置いたとされている。その後上総(かずさ)や三浦半島にも進出し、戦国大名としての地歩を固めた。義実の曽孫(そうそん)義堯(よしたか)、その子義弘(よしひろ)は、古河公方(こがくぼう)の末裔(まつえい)で小弓御所(おゆみごしょ)と称した足利義明(あしかがよしあき)と結んで後北条(ごほうじょう)氏と対抗したが、1538年（天文7）、1564年（永禄7）の両度、下総(しもうさ)国府台(こうのだい)（千葉県市川市）で後北条氏と戦い、敗れて退いた。以後義康(よしやす)のとき安房国9万2000石を豊臣秀吉(とよとみひでよし)から安堵(あんど)され、関ヶ原の戦い（1600）ののち、徳川家康から常陸(ひたち)国内に3万石を加増された。しかしその子忠義(ただよし)のとき大久保忠隣(おおくぼただちか)が大久保長安(ながやす)の不正事件に関連して罪を得たことにより、これに縁座して伯耆(ほうき)3万石に減封され、嗣子(しし)がなく断絶した。

［伊藤喜良］

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