Fukushiro Nukaga Kōichirō Genba
Masakazu Sekiguchi Hiroyuki Nagahama Yukihiko Imasaki Kazuo Ueda
The Seiyū Club (Japanese: 政友倶楽部, "Constitutional Friends Club") was a short-lived political party in Japan.
The party was established in February 1913 as a 26 MP breakaway from Rikken Seiyūkai led Yukio Ozaki over objections to Yamamoto Gonnohyōe being appointed Prime Minister.
However, some members soon defected back to Rikken Seiyūkai, and in December 1913 the remaining MPs merged with Ekirakukai to form the Chūseikai.