Hitoshi Murayama (村山斉) is a Japanese-born physicist with notable contributions in the fields of particle physics and cosmology.

In 1993, he moved to the US to join the Lawrence Berkeley National Laboratory as a post-doctoral research fellow.

In October 2014, he delivered an invited lecture titled "Science for Peace and Development" at the Headquarters of the United Nations in an event honoring the 60th anniversary of CERN.

The KamLAND collaboration won the Breakthrough Prize in Fundamental Physics in 2016.

[3] In 1998, Murayama, Gian Giudice, Markus Luty and Riccardo Rattazzi discovered "anomaly mediated supersymmetry breaking, a subtle quantum mechanical mechanism which contributes to the gaugino masses in supergravity".