Matsumoto Kazu (松本和, 15 March 1860 – 20 January 1940) was a vice admiral in the Imperial Japanese Navy, noted for his role in the Siemens scandal.

Matsumoto was born in Edo (now Tokyo) as the younger son of a direct retainer of the Tokugawa shogunate.

He served on a number of ships in the early Imperial Japanese Navy, including the corvettes Tsukuba, Settsu, Ryūjō, and Tsukushi.

During the First Sino-Japanese War he was in charge of coordinating transportation for Imperial Japanese Army units and supplies to the Asian continent, winning much praise for his abilities.

He was found guilty at a court-martial in May 1914, stripped of his rank and honors, fined 409,800 Yen and sentenced to three years in prison.