一秀 or 일수, meaning 'one, outstanding', may refer to:
Isshu Sugawara (born 1962), Japanese politician Kazuhide, a masculine Japanese given name Luo Yixiu (1889–1910), the first wife of Chinese communist revolutionary and future leader of China Song Il-soo (born 1950), the manager of the Doosan Bears
See also Isshu (disambiguation) Yixiu