Background
Ōishi was a native of Tosa Province (modern-day Kōchi Prefecture), where his father was a samurai in the service of Tosa Domain.
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Ōishi Masami
Edit Profile大石 正巳
Career
However, he had a falling out with Itagaki in 1882 and left the party. He subsequently joined with Gotō Shōjirō’s daidō danketsu (coalition) movement in 1887. In 1892, he was appointed to the Japanese legation in Seoul, of Korea.
Under the short-lived 1st Ōkuma Shigenobu administration in 1898, Oishi was appointed Minister of Agriculture and Commerce.
Ōishi later joined the Rikken Kokumintō and was at one point a contender against Inukai Tsuyoshi for its leadership. In 1913, he broke with Inukai, and joined Katsura Tarō’s new Rikken Dōshikai, where he was ranked as one of its five leaders.
He retired from politics in 1915, after having been elected to the Lower House of the Diet of Japan for six terms.
Politics
He became one of the leaders of the Jiyūtō political party in 1881. He was back in Japan by 1896, and was one of the founding members of the Shimpotō political party.
Membership
In 1873, he joined with Itagaki Taisuke and became an important member of the Freedom and People"s Rights Movement.
