John William Fenton (12 March 1828 – 28 April 1890) was an Irish musician of Scottish descent and the leader of a military band in Japan at the start of the Meiji period.
He is considered "the first bandmaster in Japan" and "the father of band music in Japan." Fenton is best known for having initiated the process through which Kimi ga yo came to be accepted as the national anthem of Japan.
Fenton is considered Scottish because his father John Fenton (1790-1833) was born in Brechin, and because he lived in Montrose in around 1881; but he is also considered Irish because he was born in Kinsale, County Cork in Ireland in 1828.
His mother, Judith Towers, was probably English.
Journalistic writing on Fenton typically considers him a Briton.