Yatarō Mishima (三島彌太郎 Mishima Yatarō?, May 4, 1867 – March 7, 1919) was a Japanese businessman, central banker and the 8th Governor of the Bank of Japan (BOJ). Viscount Mishima was a member of Japan's House of Peers.
Mishima was born in Kagoshima Prefecture.
In 1894-1900 he studied at Cornell University in Ithaca, New York where he earned a M.A. degree.
During 1911-1913, Mishima was head of the Yokohama Specie Bank.
Mishima was Governor of the Bank of Japan from February 28, 1913—March 7, 1919. As head of the bank, Mishima encouraged policies of monetary restraint.
His sudden death in 1919 was unexpected.