He lectured at Dartmouth in 1902. In 1906–1907, he was a professor at Waseda.
Asakawa was an instructor at Yale from 1907 through 1910 when became an assistant professor. He became the first Japanese professor at a major American university. He taught history at Yale for 35 years. Among those he influenced was John Whitney Hall.
Asakawa helped found Japan studies and Asian studies in the United States.
- The Early Institutional Life of Japan. (1903)
- The Russo-Japanese Conflict: Its Causes and Issues (1905)
- The Origin of Feudal Land-Tenure in Japan (1914)
- The life of a monastic shō in medieval Japan (1919)
- The documents of Iriki, illustrative of the development of the feudal institutions of Japan (1922)
His works also included contributions to the publications Japan edited by Frank Brinkley (1904); the History of Nations Series (1907); China and the Far East (1910); Japan and Japanese-American Relations (1912); and The Pacific Ocean in History (1917).
- "Kan'ichi Asakawa papers", Yale University Library
- College, Dartmouth (1898). Catalogue. Dartmouth College. p. 57.
- Chang, Gordon (1997). Morning Glory, Evening Shadow: Yamato Ichihashi and His Internment Writings, 1942–1945. Stanford University Press. p. 69. ISBN 978-0-8047-8089-6.
- Mass, Jeffrey P. (1992). Antiquity and Anachronism in Japanese History. Stanford University Press. p. 15. ISBN 978-0-8047-2592-7.
- Cohen, Warren I. (1996). Pacific Passage: The Study of American--East Asian Relations on the Eve of the Twenty-first Century. Columbia University Press. p. 42. ISBN 978-0-231-10407-4.
- WorldCat Identities: Asakawa, Kanʼichi 1873–1948
- See The Early Institutional Life of Japan; full-text book at openlibrary.org.
- DiscoverNikkei: "Asakawa bio". Retrieved 2012-11-25.
- Kiang, Lindsey (1964). A Withdrawal to Greatness: the Life of Kanichi Asakawa. Dartmouth College.
- 武田徹 (2007). Kan'ichi Asakawa: A Historian Who Worked For World Peace. 太陽出版. ISBN 978-4-88469-518-7.