Masato Shimizu (清水 真人, Shimizu Masato, born 26 February 1975) is a Japanese politician belonging to the Nikai Faction of the Liberal Democratic Party (LDP), serving his first term in the House of Councillors, representing Gumma Prefecture.

After graduating with a degree in economics, he worked in a number of social welfare service corporations, first as a trustee or councillor, then as a director, before beginning his political career.

[1] In 2008, at the age of 28, he ran for office as a member of the Takasaki city council, serving 2 consecutive terms (2003–2011).

In the 25th regular election of members of the House of Councillors held on 21 July 2019, he defeated Atsuko Saito, a candidate of the Constitutional Democratic Party of Japan, and other opposition party candidates, to become a member of the House of Councillors.

[3] Shimizu is a member of the Conference to Japan's Dignity and National Interest (Nihon no Songen to Kokueki o Mamoru Kai).