08/31/2011. Remarks by Jun Oizumi: "Together with the earlier pictured Nakajima Ki-27, the aircraft above was donated to the Japanese forces by the Dainihon Seishi Genryo Shogyo Kumiai (Japanese Commercial Pulp Union), it was inscribed Houkoku-473 Dainihonshigen-go. My grandfather, Teiji Oizumi, received the postcard as a memento when he attended the presentation ceremony of the fighters in 1941."