After graduation and a mandatory short stint in the Imperial Japanese Army, Arishima took English lessons from Mary Elkinton Nitobe, Inazo Nitobe's wife, and in July 1903, he obtained a position as a foreign correspondent in the United States for the Mainichi Shimbun.
Asahi Shimbun | Yomiuri Shimbun | Mainichi Shimbun | Nihon Keizai Shimbun | Tokyo Shimbun | Nikkei Sangyo Shimbun | Mainichi Issho | Mainichi Film Award for Best Animation Film | Mainichi Broadcasting System | ''Hochi Shimbun'' | Chunichi Shimbun |
They are organized by the Japan High School Baseball Federation in association with Mainichi Shimbun for the National High School Baseball Invitational Tournament in the spring (also known as "Spring Kōshien") and Asahi Shimbun for the National High School Baseball Championship in the summer (also known as "Summer Kōshien").
Nishimura had served as a professor at Hokkaido Imperial University, studied Marimo and was an editorial adviser to the Osaka Mainichi newspaper (now the Mainichi Shimbun).
At the time of the murder, he was employed as a newspaper deliveryman for Mainichi Shimbun in the Ikoma district of Nara Prefecture.