Kyouichi Tachikawa (立川 京一, Tachikawa Kyōichi, born 1966) is a Japanese historian specializing in international politics military history, specifically French Indochina.
He is a graduate of the Sophia University foreign language department.
As of 1999, he lectures part-time at Sophia University and at Caritas Junior College.
Currently he is working as a researcher for the Japanese Ministry of Defense where he does research on military history.
This article about a Japanese historian or genealogist is a stub.