Komazawa University (駒澤大学, Komazawa Daigaku), abbreviated as 駒大 Komadai, is a private university in Setagaya, Tokyo, Japan. Its history starts in 1592, when a seminary was established to be a center of learning for the young monks of the Sōtō sect, one of the two main Zen Buddhist traditions in Japan. The seminary evolved into a modern school in the late 19th century, and became a university in 1925.

The university in Tokyo campus comprises seven faculties and 17 departments with a total of around 14,000 students. Also, for students who wish to pursue advanced studies, each department has a graduate school. It also has eleven research institutes and a Museum of Zen Buddhist Culture. Times Higher Education places Komazawa University in the 150+ bracket in its ranking of Japan's 200 best universities.