Cover of "Nippon" magazine issue
Ayao Yamana created the first cover of Nippon Kono in 1934. It was significant because Nippon Kobo used to be ran by several photographers and graphic designers and she became part of the group. After a while, she was unhappy with working with the members. Thus, she left the group to establish Chuo Kobo.

Mon, May 27, 2024
This text might provide more information about Ayao Yamana, who appears to be misgendered in the text above: Yamana, Ayao. Ayao Yamana Graphic Design. Pie Books, 2005.
this text includes information about Chuo-Kobo: Seki, Yasuko. ""Hiromu Hara: Graphic Designer in the Japanese Design Archive Survey" Platform for Architectural Thinking." last accessed May 27, 2024. https://npo-plat.org/hara-hiromu-en.html