Suiin Emi (江見 水蔭, Emi Suiin, 17 September 1869 – 3 November 1934), born Tadanori Emi (江見 忠功, Emi Tadanori), was a Japanese novelist and journalist. Born in Okayama into a shizoku (former samurai) family, he travelled to Tokyo to join the army but instead joined the Kenyūsha literary society and quickly became celebrated during the Sino-Japanese War for his patriotic stories in the newspaper . He was the first to refer to sumo as the national sport (kokugi), inspiring the name of the Ryōgoku Kokugikan stadium built in 1909. He died in Matsuyama.