Koriyama Domain

A domain that ruled the area around Koriyama, Sounoshimo County, Yamato Province (Yamatokoriyama City, Nara Prefecture). This area was the site of a gunke (gunke) during the Nara period, and in the Middle Ages, Koriyama Manor and Yakuon Manor were located here. Koriyama Castle is said to have first been built by Odagiri Harutsugu at the end of the Muromachi period, and after 1578 (Tensho 6), Tsutsui Junkei made the castle his base and began full-scale construction. After that, large-scale expansions and renovations were carried out throughout the Toyotomi and Masuda clans, and the castle was completed. In 1585, Hidenaga Hashiba, the younger brother of Toyotomi Hideyoshi, came from Izushi in Tajima Province to replace the Tsutsui clan as the governor of Yamato, Kii, and Izumi Provinces with a fief of 1 million koku. After the early death of his adopted son Hidetoshi (Hideyasu), Nagamori Masuda, one of the five magistrates of the Toyotomi government, was granted a fief of 200,000 koku in 1595 (Bunroku 4), and the area around the castle prospered. However, after the Battle of Sekigahara, the distribution of power in Yamato Province changed drastically, and Koriyama Castle came under the care of Takatora Todo, and from 1608 (Keicho 13) Tsutsui Tomono came to manage it as the deputy governor, causing a temporary decline. After the Siege of Osaka, feudal lords were once again assigned, and there were successive changes of lords: Mizuno Katsunari with 60,000 koku in 1615 (Genwa 1), Matsudaira (Okudaira) Tadaakira with 120,000 koku in 1620 (Genwa 6), Honda Masakatsu with 190,000 koku (including his heir, Shishi Katsuyuki, with 40,000 koku), Matsudaira (Fujii) Nobuyuki with 80,000 koku in 1779 (Enpo 7), and Honda Tadahira with 120,000 koku in 1885 (Jokyo 2). The Honda clan continued through Tadatsune, Tadanao, and Tadamura, but the main line died out and was succeeded by his younger brother Tadatsura, who died young. The following year, in 1724 (Kyoho 9), Yanagisawa Yoshiyasu's son Yoshisato was transferred from Kofu with a fief of 150,000 koku and settled there. After that, Nobutoki, Yasumitsu, Yasuhiro, and Yasuoki followed suit, and in 1871 (Meiji 4) during the time of the sixth head Yasunobu, the feudal domains were abolished and prefectures were established.

The reason why powerful fudai daimyo were stationed in Koriyama and frequently replaced was because the area was close to Kyoto and Osaka and was considered important militarily and politically. During this time, a major incident occurred within the domain, the Kuroku Disturbance, which occurred in 1671 (Kanbun 11) after the death of Honda Masakatsu, over the succession of the family (the shogunate decided to divide 90,000 koku of rice to his adopted son Masanaga and 60,000 koku to his biological son Masatoshi). It is also well known that Yanagisawa Yoshiyasu, while residing in Kofu, consulted with the Confucian scholar Hosoi Heishu and conducted a survey of mountain tombs mainly in Yamato, and that Yoshisato established the domain school Soukeikojo soon after joining the domain. After the establishment of Koriyama Prefecture in 1871 (Meiji 4), the area was incorporated into Nara Prefecture, Sakai Prefecture, and Osaka Prefecture, before being incorporated into Nara Prefecture, which was re-established in 1887.

[Yoshitomo Hirai]

"History of Yamatokoriyama City" (1966, Yamatokoriyama City)

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

大和(やまと)国添下(そうのしも)郡郡山（奈良県大和郡山市）周辺を領した藩。この地は奈良時代の郡家(ぐんけ)の地であり、中世には郡山荘(しょう)、薬園(やくおん)荘が置かれた所である。郡山城は室町末期に小田切春次(おだぎりはるつぐ)が砦(とりで)を築いたのが初めといわれ、1578年（天正6）以降、筒井順慶(つついじゅんけい)がここに拠(よ)って本格的な築城を始めた。その後、豊臣(とよとみ)氏、増田(ました)氏時代を通じて大規模な増改築が行われ完成した。85年筒井氏にかわり、豊臣秀吉の実弟羽柴秀長(はしばひでなが)が但馬(たじま)国出石(いずし)より、大和、紀伊、和泉(いずみ)3か国100万石の大守として入部。その養子秀俊(ひでとし)（秀保(ひでやす)）夭折(ようせつ)後、1595年（文禄4）には豊臣政権の五奉行の一人増田長盛(ながもり)が20万石で封ぜられ、城下は繁栄を遂げた。しかしながら、関ヶ原の戦いが終わると大和国の勢力配分は一変し、郡山城は藤堂高虎(とうどうたかとら)の預りとなり、また1608年（慶長13）以降は筒井主殿(とのも)が代官として管理することになり、一時衰微をきたした。その後、大坂の陣ののちふたたび大名配置が実施され、1615年（元和1）水野勝成(かつなり)6万石、20年（元和6）松平（奥平）忠明(ただあきら)12万石、39年（寛永16）本多政勝19万石（うち嗣子(しし)勝行分4万石）、79年（延宝7）松平（藤井）信之(のぶゆき)8万石、85年（貞享2）本多忠平12万石と領主の交代が相次いだ。本多氏は、忠常、忠直、忠村と続いたが本系が絶え、弟忠烈(ただつら)が家を継いだが、夭逝(ようせい)絶家した。かくてその翌1724年（享保9）柳沢吉保(やなぎさわよしやす)の子吉里(よしさと)が甲府より15万石で移封となり定着する。以後、信鴻(のぶとき)、保光、保泰(やすひろ)、保興(やすおき)と続き、6代目保申(やすのぶ)のとき1871年（明治4）廃藩置県となった。

　このように郡山に有力譜代(ふだい)大名が配置され頻繁な交代が実施されたのは、この地が京・大坂に近く軍事的、政治的に重要視されていたためである。この間、藩内の主要な事件としては1671年（寛文11）本多政勝没後、跡目相続をめぐって起きた「九六(くろく)騒動」と称する御家騒動が著名である（幕府裁定で養子政長に9万石、実子政利に6万石を分割）。また、柳沢吉保が甲府在城時代から儒者細井平洲(へいしゅう)の議をいれ、大和を中心に山陵調査を行ったことや、入部早々吉里によって藩校総稽古所(そうけいこじょ)の設立が行われたこともよく知られる。なお、1871年（明治4）郡山県設置後は、奈良県、堺(さかい)県、大阪府を経て、87年再置の奈良県に編入された。

［平井良朋］

『『大和郡山市史』（1966・大和郡山市）』

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