Kai-ichi Seda: ともこ 妖しさの彩り
Kai-ichi Seda, born 1933, was active under many pseudonyms (as was many other in SM-publishing of his generation), in this publication he is called ”Yasushi Arakawa”. You can read more about him here: http://www.nawapedia.com/index.php?title=Kai-ichi_Seda
Here, I will just mention that Kai-ichi Seda was working with the Kitan Club magazine in its last phase (1967–1975, as it was published by Akatsuki), and then went on to publish some other smaller magazines, including Sun & Moon where Roppongi Kaoru joined him for the first issues. It seems, Kai-ichi Seda made also several other collaborations with Roppongi Kaoru.
Publisher たざわ書房, 1982