@article{oai:uec.repo.nii.ac.jp:00006824,
 author = {島内, 景二 and Shimauchi, Keiji},
 issue = {2},
 journal = {電気通信大学紀要},
 month = {Jan},
 note = {Tsunoda Ryusaku (1877-1964) devoted himself over the latter half of his life to the research of Japanese culture at Columbia University. He was also an exellent lecturer, and many outstanding scholars of Japanese studies (e.g. Donald Keene and Herbert Norman) were inspired by his series of lectures. Tsunoda is, therefore , renowned as "the father of Japanese studies in the USA".
It had been posited that Tsunoda's first publication was "Ihara Saikaku", published on 30th May of the Meiji era, by Minyusha Publishing. We discovered, however, that earlier publications existed. In fact, he wrote many books and articles immediately following his graduation from Tokyo Senmon Gakko (today's Waseda University) at the age of 19. The newly discovered publications are as follows: 
Tsunoda wrote six books , under three pseudonyms, (i.e. Ryokutei Shujin, Ryokuteisei and NakaRyuji). They were published by Minyusha Publishing within a six-month period, between 29th November and 30th April of the Meiji era. The books are : (1) Murasakisikibu, (2) Seishonagon,(3) Poet Saigyo, (4) Kumoi Tatsuo, (5) Kenko Hoshi and (6) @@@@.
Additionally, it is conceivable that Tsunoda wrote "The Summary of Japanese Literature" (Nihon Bungaku Kougai) as well, though no auther is named on the book. Moreover, he anonymously produced a great number of novels, critiques and essays for a newspaper, "Kokumin Shimbun", and a magazine, "Katei Zasshi", published by Minyusha Publishing.
These findings are significant, because they shed light on the intellectual development of Tsunoda, "the father of Japanese studies in the USA". It was revealed that his early publications, concerning the authors of the Japanese literature from ancient times to the Meiji Restoration, contributed to his further understanding of Japanese culture. It is particularly noteworthy that Tsunoda's early publications demonstrated that he regarded Buddhism as the central core of the Japanese historical spirit. This can be evidenced by the fact that he subsequently discussed this very issue inhis series of lectures at Columbia University. Our findings show that, using sophisticated language,the young Tsunoda Ryusaku powerfully and convincingly argued that this Ancient spirit differently affected the character of each Age.},
 pages = {137--161},
 title = {緑亭生・緑亭主人は、角田柳作か － 明治二十九年から三十年までの民友社の彗星 －},
 volume = {16},
 year = {2004},
 yomi = {シマウチ, ケイジ}
}