This past week, French forces joined the Japan Self-Defense Force, Australian Defence Force and U.S. military for a multilateral amphibious exercise in Camp Ainoura, Sasebo. This marks the first time French ground forces have trained on Japanese soil in the postwar era.

This training comes on the heels of two French naval vessels that made port in Kochi last month, en route to a joint maritime exercise with members of the so-called “Quad” (Australia, India, Japan and the United States).

These activities are representative of the steps Japan is taking to diversify its portfolio of security partners, but many outside observers may now be asking the blunt but obvious question: Why France?