Seidōsha
Seidōsha (青憧社) was a Japanese photography group founded in Nagoya in March 1938 by Kansuke Yamamoto, Genyū Yoshitake, Shin'ichi Kanamori, and Kyūhei Matsuwa. Active during the late 1930s and early 1940s, the group later issued the newsletter Carnet Bleu and formed part of the small-scale network through which Yamamoto continued avant-garde photographic and editorial activity in wartime Nagoya.