Kazuhiro Haraguchi (原口 一博, Haraguchi Kazuhiro, born 2 July 1959) is a Japanese politician of the Constitutional Democratic Party of Japan and a member of the House of Representatives in the Diet (national legislature).

In 1996 he was elected to the House of Representatives from Saga's 1st district for the first time as a member of the New Frontier Party (Shinshinto) after running unsuccessfully in 1993 as an independent.

Haraguchi studied Psychology at the University of Tokyo and attended the Matsushita Institute of Government and Management.

[1] In the 2012 general election Haraguchi lost his single-seat electorate but retained a seat in the diet through the proportional representation system.

[4] Haraguchi mentioned support for Ukraine in a YouTube video and said, "Japan is behind the neo-Nazi regime."