Sengoku Incident - Sengoku Incident

During the Tenpo era (1830-44), the Sengoku family, a daimyo of the Izushi domain in Tajima (Hyogo prefecture) with a fief of over 58,000 koku, experienced a family feud. In 1824 (Bunsei 7), the domain's lord Masayoshi died suddenly, but as he had no heir, his younger brother Michinosuke (5 years old, Hisari) took over. Sengoku Sakyo, a senior retainer who was a branch of the Sengoku family and held a fief of 1,500 koku and was influential, tried to support his own son Kotaro in place of Michinosuke. He married Kotaro's daughter, Chikara, the younger brother of Matsudaira Yasuto, a senior councilor, and got closer to Yasuto. He also lobbied Masayoshi's father Hisamichi to remove and punish the senior vassals. As a result, the opposition leader, Kono Sehyō, heard about Sakyo's actions, and his relative, Sengoku Chōnosuke, filed a complaint with the shogunate, which brought the matter to light. After an investigation by the Magistrate of Temples and Shrines, Wakizaka Yasushige, it became clear that Sakyo and his associates had plotted, and in 1835 (Tenpo 6), they were found guilty and the Izushi Domain's kokudaka (rice yield) was reduced to just over 30,000 koku.

[Shigeru Kobayashi]

"Hyogo Prefecture History 5" (1980, Hyogo Prefecture)

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

天保(てんぽう)年間（1830～44）に但馬(たじま)（兵庫県）出石(いずし)藩5万8000石余の外様(とざま)大名仙石家に起きた御家騒動。1824年（文政7）藩主政美(まさよし)が急死したが嗣子(しし)がなかったので、弟道之助（5歳、久利）が継いだ。仙石家の分家筋で1500石を知行(ちぎょう)して権勢のあった家老上席の仙石左京(さきょう)は、実子小太郎を擁立して道之助にかえようとした。小太郎の妻に老中松平康任(やすとう)の弟主税(ちから)の娘を迎えて康任に近づき、また政美の父の久道に働きかけて重臣を退け処罰した。このため反対派の河野瀬兵衛が左京の動きを聞き、同族の仙石長之助が幕府に出訴したことから表面化した。寺社奉行(ぶぎょう)脇坂安董(わきざかやすしげ)の取調べの結果、左京らの陰謀が明白となり、35年（天保6）断罪、出石藩の石高(こくだか)は3万石余に減封された。

［小林　茂］

『『兵庫県史 5』（1980・兵庫県）』

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