The Kavli Institute for the Physics and Mathematics of the Universe (IPMU), located in Kashiwa, Japan, near Tokyo, is an international research institute dedicated to unraveling the deepest mysteries of the cosmos. It merges advanced physics and mathematics to address fundamental questions concerning the universe's origin, fate, composition, and fundamental laws, spanning fields like particle physics, astrophysics, and astronomy.

The institute was founded on October 1, 2007, by its director Hitoshi Murayama and the University of Tokyo, with initial funding from the Japanese Ministry of Science as part of their World Premier International Research Center Initiative. In 2012, it received a significant endowment from the Kavli Foundation, leading to its renaming and inclusion as one of the 20 prestigious Kavli Institutes worldwide. IPMU attracts a diverse group of notable scientists, including its founding director Hitoshi Murayama and Takaaki Kajita, contributing to its status as a leading global research center.