In September 2011, the Mitsui Endowed Professorship Fund was established at Dartmouth College, located in the state of New Hampshire in the United States.

A member of the Ivy League, Dartmouth was established in 1769. Mitsui has been sending staff to Dartmouth over the past 50 years, and the college has deep historic ties with Mitsui.　Since January 2013, Mr. Yusaku Horiuchi, who was selected as the Mitsui Endowed Professor, has been offering courses related to the politics of modern Japan. Through efforts with the college, Mitsui aims at the development of students who have a deep understanding of Japan and who can contribute to the enhancement of the relationship between the United States and Japan and actively engage in the global arena.