抄録
Yoshio Mikami and Li Yan are the pioneers of the study of mathematical history in East Asia. They were corresponding about the study of mathematical history from 1914 to 1937. Mr. Li wrote Mr. Mikami 45 letters for over these 23 years. Mr. Sadao Fuji'i dicovered the letters before 2004, and published the list in “Mikami Yoshio's Remaining Manuscripts Catalogue” in 2004. This discovery of Mr. Fuji'i is very significant for researching the exchanging history of the study of mathematical history between China and Japan.
