- 1958 Born in Texas, USA
- 1979 B.A. with Honors, University of Oregon (Asian Studies)
- 1986 A.M., Stanford University (History)
- 1989 Ph.D., Stanford University (History)
- 1989 Began teaching at Obirin (now J. F. Oberlin) University, Tokyo
- 1991-1995 Director, Inter-University Center for Japanese Language Studies, Yokohama
- 2007-2012 Vice-President for International Affairs, J. F. Oberlin University
- 2012-2016 Dean of Graduate Studies, J. F. Oberlin University
- 2016-2018 Founding Dean, College of Global Communication, J. F. Oberlin University
- 2016- Resident Director, Inter-University Center for Japanese Language Studies
- Environment and Society in the Japanese Islands: From Prehistory to the Present (Co-edited with Philip C. Brown) (Corvallis: Oregon State University Press, 2015) (order from press)
- Gateway to Japan: Hakata in War and Peace, 500 - 1300 (Honolulu: University of Hawai‘i Press, 2006年) （order from press）
- To the Ends of Japan: Premodern Frontiers, Boundaries, and Interactions (Honolulu: University of Hawai‘i Press, 2003年)
- Nihon no “kyokai”: Zenkindai no kokka, minzoku, bunka (Japan’s “Boundaries”: State, Ethnicity, and Culture in Premodern Times). Tokyo: Aoki Press, 2000.
- Kokkyo no tanjo: Dazaifu kara mita Nihon no genkei (Birth of the Frontier: Early Japan as Seen from Dazaifu). Tokyo: NHK Books, 2001.
Major articles (English only)
- “Climate and Environment in History.” In The Routledge Handbook of Premodern Japanese History, edited by Karl F. Friday, 23-37. New York: Routledge, 2017.
- “Hakata and Dazaifu: Crossroads, Boundaries, and Identity Formation in Ancient Kyushu.” In Hakata: The Cultural Worlds of Northern Kyushu, edited by Andrew Cobbing, 13-23. Leiden: Brill, 2013.
- “Early Japan and the Continent.” In Japan Emerging: Introductory Essays on Premodern Japanese History, edited by Karl F. Friday, 89-97. Boulder, CO: Westview Press, 2012.
- “An Open and Shut Case? Some Thoughts on Late Heian Foreign Trade.” In Currents in Medieval Japanese History: Essays in Honor of Jeffrey P. Mass, edited by Gordon M. Berger, et al., 303-332. Los Angeles: Figueroa Press, 2009.
- “Climate Change in Japanese History and Prehistory.” Occasional Papers in Japanese Studies No. 2009-01. Cambridge, Mass.: Edwin O. Reischauer Institute of Japanese Studies, Harvard University, 2009.
- “Cross-Border Traffic on the Kyushu Coast, 794-1086.” In Heian Japan, Centers and Peripheries, edited by Mikael Adolphson, et al., 357-383. Honolulu: University of Hawai‘i Press, 2007.
- “Frontiers and Boundaries of Premodern Japan.” Journal of Historical Geography 25, no. 2 (1999): 166-182.
- “Provincial Administration in Early Japan: From Ritsuryo kokka to Ocho kokka.” Harvard Journal of Asiatic Studies 53, no. 1 (1993): 103-134.
- “Documentary Evidence for Institutional Change at the Dazaifu, 1000-1185.” Kokusai bunka kenkyu (Obirin University) 11 (1990): 23-60.