Kazuhiro Hayashi (林 和広, Hayashi Kazuhiro, born May 18, 1973) is a Japanese professional wrestler known simply as Kaz Hayashi (カズ・ハヤシ, Kazu Hayashi). He is best known for his work in All Japan Pro Wrestling (AJPW), where in addition to being a wrestler for the promotion, he also served as the head booker for the company's junior heavyweight division. After leaving AJPW in 2013, Hayashi competed for Wrestle-1, where he also worked as a trainer. In April 2017, Hayashi took over as the new president of Wrestle-1, remaining in the position until the promotion's closure in 2020; he was also the promotion's final champion of the Wrestle-1 Championship. In August 2020, Hayashi joined Gleat as both an in-ring wrestler and the promotion's Chief Technical Officer.