In 1900 the Rikken seiyukai (立憲政友会 Friends of Constitutional Government, a political party) was formed with members of the Kenseito former Liberal Party faction as its base and Ito as its leader; the fourth Ito Cabinet was inaugurated on the basis of the Rikken seiyukai.
1900年には憲政党の旧自由党派を中心に伊藤を総裁として立憲政友会が結成され、これを基に第4次伊藤内閣が発足した。