Hitotsubashi University (一橋大学, Hitotsubashi daigaku) is a national university located in Tokyo, Japan. It has campuses in Kunitachi, Kodaira, and Chiyoda. One of the top 9 Designated National University in Japan, Hitotsubashi is a relatively small institution specialized solely in social sciences with about 4,500 undergraduate students and 2,100 postgraduate students.

Established in 1875 by Mori Arinori and evolved from Tokyo College of Commerce, Hitotsubashi has been consistently ranked amongst the top universities in Japanese university rankings and considered the best in economics and commerce related subjects in Japan. It was ranked 25th in the world in 2011 by Mines ParisTech: Professional Ranking of World Universities.

Hitotsubashi has strong relationships with overseas universities. There are around 600 international students and 450 researchers from abroad under academic exchange agreements with 83 universities and research institutions, including University of Chicago, the University of Oxford and the University of California.

The university's symbol is inspired by Mercury, Roman mythology's god of commerce.

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