Mifuyu Koide (小出 深冬, Koide Mifuyu, born December 21, 1995) is a Japanese rugby sevens player.

She competed at the 2016 Summer Olympics for the Japan women's national rugby sevens team.

[1][2] Japan finished in 10th place overall.

[3] She was named in the Sakura Sevens squad to compete at the 2022 Rugby World Cup Sevens in Cape Town.

This Japanese rugby union biography is a stub.