Hara held several minor ambassadorial roles before rising through the ranks of the Rikken Seiyūkai and being elected to the House of Representatives. Hara served as Home Minister in several cabinets under Saionji Kinmochi and Yamamoto Gonnohyōe between 1906 and 1913. Hara was appointed Prime Minister following the Rice Riots of 1918 and positioned himself as a moderate, participating in the Paris Peace Conference, founding the League of Nations, and relaxing oppressive policies in Japanese Korea. Hara's premiership oversaw the Siberian intervention and the March 1st Movement. Hara was assassinated by Nakaoka Kon'ichi on 4 November 1921.