Keiji Kikkawa (吉川 圭二 Kikkawa Keiji, October 01, 1935-July 01, 2013) was a Japanese theoretical physicist. 
|Died||1 July 2013|
|Alma mater||Tokyo Metropolitan University, University of Tokyo|
|Awards||Nishina Memorial Prize (1988)|
Kikkawa received his bachelor's degree from Tokyo Metropolitan University in 1959, and a PhD from the University of Tokyo in 1964. After that he conducted research at the University of Tokyo, the University of Rochester and the University of Wisconsin. From 1970 he was associate professor at City College of New York and from 1974 at the Osaka University. From 1979 he was professor at Hiroshima University. In 1983 he returned to Osaka University where he worked until 1993. Between 2000 and 2004 he was a professor at Kanagawa University.