西園寺公望
The "Seiyūkai" came into power in October 1900 under the 4th Itō administration. Under its second leader, Saionji Kinmochi, it participated in the Movement to Protect Constitutional Government from 1912 to 1913. It was the ruling party under the Prime Minister Yamamoto Gonnohyōe from 1913 to 1914. Cabinet minister (and later 4th party president) Takahashi Korekiyo helped reinforce its ties with the "zaibatsu," especially the Mitsui financial interests.