Hojo Ujinobu

He was born in 1545 (Tenbun 14) as the fifth son of the Sengoku daimyo Hojo Ujiyasu. His mother was the daughter of Imagawa Ujichika. He was commonly known as Sukegoro. His official title was Kanto Samansuke, and his title was Mino no Kami. As a boy, he stayed in Sunpu as a hostage under the Imagawa clan, where he is said to have become acquainted with Matsudaira Takechiyo (later Tokugawa Ieyasu), who was also a hostage. In 1567 (Eiroku 10), he became the son-in-law of Hojo Tamemasa, who ruled over Tamanawa Castle in Sagami Province and Miura County in the same province, and inherited control of the county, becoming the lord of Misaki Castle. In that position, he controlled pirates such as the Kajiwara clan, and was responsible for the maritime defense of Edo Bay, while also dealing with clans in the Boso region such as the Satomi clan. From 1569 until the downfall of the Hojo clan in 1590, he was intermittently stationed at Nirayama Castle in Izu Province as the castle commander, responding to invasions by the Takeda and Toyotomi clans. He also temporarily served as castellan of Tatebayashi Castle in Kozuke Province in the mid-Tensho era. In terms of diplomacy, he was in charge of negotiations with the Tokugawa and Toyotomi clans, due to his relationship with them as a boy. After the downfall of the Hojo clan, he was given land in Kawachi Province, and his eldest son, Ujimori, inherited the Sayama Domain of the Hojo clan. He died in 1600 (Keicho 5) at the age of 56. Currently, he has around 80 issued documents remaining, including a red seal letter bearing the inscription "Truth", as well as letters and stamps.

[Yutaka Arimitsu]

Sugiyama Hiroshi, "On the Documents Issued by Hojo Ujinobu" (included in "Collection of Essays on Sengoku History, Kanto Center," edited by the Eastern Sengoku History Research Group, 1980, Meishu Publishing) ▽ Kuroda Motoki, "The Establishment of Hojo Ujinobu's Control of Miura County" (included in "The Territorial Control of the Hojo Clan, a Sengoku Daimyo," 1995, Iwata Shoin) ▽ Kuroda Motoki, "Consideration of the Hojo Ujinobu Documents" (included in "The Control Structure of Sengoku Daimyo Territories," 1997, Iwata Shoin) ▽ Kuroda Motoki, "The Hojo Clan's Control of the Kozuke and Tatebayashi Territories" (included in "Daimyo and Kokushu of the Eastern Provinces in the Sengoku Period," 2001, Iwata Shoin)

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

1545年（天文14）に戦国大名北条氏康(うじやす)の五男として誕生。母今川氏親(いまがわうじちか)娘。通称助五郎。官途左馬助、受領名美濃守。少年期、人質として今川氏のもと駿府に滞在、同じく人質であった松平竹千代（のちの徳川家康）と知己をえるという。1567年（永禄10）には、相模国玉縄(たまなわ)城主で同国三浦郡などを支配していた北条為昌(ためまさ)の女婿として、同郡の支配を継承し三崎城主となる。その立場で梶原氏などの海賊衆を支配下に置き、江戸湾の海上防備にあたるとともに、里見氏などの房総方面の諸氏に対処した。1569年以降北条氏滅亡の1590年まで、伊豆国韮山城(にらやまじょう)に城将として断続的に在城し、対武田氏や豊臣氏の侵攻に対応した。また、天正年間中期には一時的に上野国(こうずけのくに)館林城(たてばやしじょう)の城代でもあった。外交的には少年期の関係で徳川氏や、また豊臣氏との折衝の任にあたった。北条氏滅亡後、河内国に所領を与えられ、嫡男氏盛が狭山藩(さやまはん)北条氏を継承している。没年は1600年（慶長5）で56歳であった。現在、印文「真実」の朱印状をはじめ書状、判物など80通ほどの発給文書を残している。

［有光友學］

『杉山博著「北条氏規の発給文書について」（東国戦国史研究会編『戦国史論集　関東中心』所収・1980・名著出版）』▽『黒田基樹著「北条氏規の三浦郡支配の成立」（『戦国大名北条氏の領国支配』所収・1995・岩田書院）』▽『黒田基樹著「北条氏規文書の考察」（『戦国大名領国の支配構造』所収・1997・岩田書院）』▽『黒田基樹著「北条氏の上野館林領支配」（『戦国期東国の大名と国衆』所収・2001・岩田書院）』

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