This is a complete collection of "Yuibutsuron Kenkyu" (Studies in Materialism), the journal of the Yuibutsuron Kenkyukai (Materialism Research Society). The exterior shows some sun damage, but the main body is in good condition. #End-of-LifeBooks The Yuibutsuron Kenkyukai (Materialism Research Society) was founded on October 23, 1932 (Showa 7) by Jun Tosaka, Hiroto Saegusa, Kunio Oka, and others. The abbreviation is "Yuiken." Centered around Kunio Oka, Hiroto Saegusa, and Jun Tosaka, the group held several meetings starting around June 1932 (Showa 7) with Kinonosuke Ogura, Hiroshi Nagata, Yukimasa Hattori, Kenzo Honda, and others. On September 25, they held an inaugural meeting, with Nyozekan Hasegawa as chairman, to present a draft of the articles of association, publish a journal, recommend members, prepare for a general meeting, and report on finances. The purpose of the society's establishment was stated in Article 1 of the articles of association: "To study materialism in natural science, social science, and philosophy, and to contribute to enlightenment, without being detached from real-world issues." They appointed 17 directors and confirmed 40 founders. To avoid suppression under the Peace Preservation Law, the group did not take the form of an organization of Marxists, but was founded solely for the purpose of broadly studying materialism, and thus included scientists who did not necessarily hold Marxist views (such as Torahiko Terada). Since its founding, the society held research meetings every Saturday night and published a journal (described below). Although they claimed that their activities did not have political intentions or significance, on January 8, 1938 (Showa 13), they held a board meeting and decided to suspend meetings and revise the editorial policy of the journal. Furthermore, on February 12 of the same year, they were forced to voluntarily disband. The journal "Yuibutsuron Kenkyu" ceased publication. Although the period of activity was short, the society had a great influence on the intellectual world at the time, as well as on the study of materialism in post-war Japan, through the publication of "Yuibutsuron Zensho" (Complete Works on Materialism). The journal was "Yuibutsuron Kenkyu," published from the first issue in November 1932 to the 65th issue in March 1938. The society's thought is characterized by the objective thinking and clarity of thought under the influence of Jun Tosaka. Members: Manjiro Hasegawa, Tan Koizumi, Kinonosuke Ogura, Kenzo Honda, Hiroto Saegusa, Kotaro Tomiyama, Hidetomo Oka, Yukimasa Hattori, Hibiki Saito, Jun Tosaka, Kunio Oka, Shozo Uchida, Tomoyuki Ishii, Ryo Namikawa, Ikutaro Shimizu, Goro Hani, Tatsuo Hayashi.