In 1888, while still a student, Kojuro presented an article titled 'The method to establish the common writing style between men and women' with Naohiko (Masahiko) MASAKI, who was his close friend and later became the principal of Tokyo Fine Arts School (present Tokyo University of Arts) in the educational journals "Dainihon Kyoikukai Zasshi "(Vols. 73 and 74: March and April) and "Kyoshi no Tomo" (Vols. 10 and 11: March and April).
1888年、当時まだ学生だった小十郎は、「大日本教育会雑誌（第73・74号3・4月号）」および「教師之友（第10・11号3・4月号）」に、親友でのちに東京美術学校（現在の東京芸術大学）校長となる正木直彦（政彦）と連盟で「男女ノ文体ヲ一ニスル方法」という論文を発表している。