The Rikken Seiyūkai was one of the main political parties in the pre-war Empire of Japan. It was also known simply as the Seiyūkai.

Prince Itō Hirobumi was a Japanese politician and statesman who served as the first Prime Minister of Japan. He was also a leading member of the genrō, a group of senior statesmen that dictated Japanese policy during the Meiji era. He was born as Hayashi Risuke, also known as Hirofumi, Hakubun, and briefly during his youth as Itō Shunsuke.