Inside Yamagata University's largest research partnership: Tohoku University

Behind Yamagata University's research output sits a defining relationship: 476 co-authored works with Tohoku University (Japan) in the five years to 2025, the university's single largest collaboration.

It anchors an unusually connected research base: 641 collaborating institutions across 63 countries, producing 4,935 joint works over the window, with international co-authors on 22% of output.

The collaborative work travels: its field-weighted citation impact stands at 1.54, where the world average is 1.0.

The Research Collaboration Index, the first global account of how universities actually collaborate, publishes its first full edition on Tuesday 15 September at 09:00 UK.

Every figure derives from the open global research record and is checkable at source.