The reality of the middle school Japanese textbooks Chuto Kokubun has not been made clear even today. Jiro Morishita is the best friend of Minoru Nishio. Nishio recommended Morishita the compiler of Chuto Kokubun. Morishita worked hard.He writed a diary during the days. It is "Morishita's Diary". In this diary, he wrote the process of Chuto Kokubun. This diary is the most important material of the Japanese textbooks.