Iroha Nagata (born 21 December 1998) is a Japanese rugby union and sevens player.

She attended Moji Gakuen High School and graduated in 2017.

In 2022, she competed for the Japan women's national team at the delayed 2021 Rugby World Cup in New Zealand.

Nagata also participated in the two-test series against the United States in August 2024.

[1] She subsequently captained the Sakura fifteens at the 2024 WXV 2 tournament in South Africa.