Mizuho Kataoka (片岡瑞帆, born 11 October 1994 ) is a Japanese women's rugby union player.

After graduating from Shiba Commercial High School in 2013, she entered Nippon Sport Science University.

In 2015, she was appointed captain of the women's team at Nippon Sport Science University.

[3][4] In 2017, she was named in Japan's squad for the Rugby World Cup in Ireland.

[5][6][7][8] In 2023, Kataoka had a stint with the Auckland Storm in the Farah Palmer Cup competition.