Yuna Hiraiwa

is a Japanese artistic gymnast. She is the 2014 and 2021 Japanese national all-around bronze medalist and the 2014 Japanese balance beam champion. She was a member of the Japanese teams for the 2014 World Championships and the 2020 Summer Olympics.

Career Junior Hiraiwa made her international debut at the 2013 International Gymnix in Montreal, Canada. She finished twenty-first in the all-around, sixth on the balance beam, and fifth on the floor.

Senior 2014 Hiraiwa made her senior debut at the All-Japan Championships in May. She improved from her eighth-place finish in qualifications to earn the bronze medal behind Natsumi Sasada and Asuka Teramoto. Hiraiwa then finished eleventh at the NHK Cup in June. She captured the balance beam title at the All-Japan Event Championships in July. As a result, Hiraiwa was named to the Japanese team for the World Championships alongside Sasada, Teramoto, Yu Minobe, Mai Murakami, and Wakana Inoue, where she was the youngest member. At the World Championships, Hiraiwa broke her right middle finger and metacarpal bone while training on the uneven bars and returned home to Japan for further examination and treatment; she was replaced by Azumi Ishikura. At the NHK Trophy a month later, which combined scores from All-Japan, she improved slightly to finish twenty-first.

2016 Hiraiwa began her season by competing on three events (excluding uneven bars) at the WOGA Classic in Frisco, Texas, winning the silver medal on the floor behind Canadian gymnast Shallon Olsen. She then competed alongside Nagi Kajita and Sae Miyakawa at the International Gymnix in March, finishing sixth as a team. Individually, Hiraiwa was fifteenth in the all-around, seventh on the balance beam, and eighth on the floor exercise. She missed the All-Japan Championships due to injury but recovered to compete on uneven bars and balance beam at the All-Japan Event Championships the following month.

2017 Hiraiwa finished thirty-third in qualifications at the All-Japan Championships and did not advance to the final. She competed only on the balance beam at the All-Japan Event Championships but did not advance to the final. Competing for Mukogawa Women's University at the All-Japan Student Championships, Hiraiwa finished fifth in the all-around and won silvers on vault, balance beam, and floor exercise. She competed on three events (excluding uneven bars) for Mukogawa Women's University at the All-Japan Team Championships to help the team finish fourteenth overall.

2018 Hiraiwa struggled at the All-Japan Championships, finishing fifty-fifth in qualification and failing to advance to the final for a second year in a row. She competed on the balance beam and floor at the All-Japan Event Championships, qualifying in third for the balance beam and narrowly missing the floor final due to an out-of-bounds penalty. Hiraiwa captured the bronze medal behind Mai Murakami and Asuka Teramoto in the balance beam final, her first national medal since 2014.

2019 Following a career-worst finish at the 2018 All-Japan Championships, Hiraiwa transferred from her college team, where she was coached by Japanese national team head coach Kazukuni Ohno, to train with 1996 Olympian Risa Toyoshima (née Sugawara) at the Toda Sports Club.

Hiraiwa credits the transfer to Toyoshima for gradually helping her overcome her mental struggles and fear stemming from her 2014 injury. She stated that Toyoshima taught her "doing [her] own gymnastics is more important than the result" and that Toyoshima's guidance allowed her to replace her fear with the "joy of gymnastics" again. After the Olympics, she competed at the World Championships and competed on the floor exercise. She qualified for the event final where she finished eighth.

2022 Hiraiwa finished seventh on the balance beam at the All-Japan Event Championships.

Competitive history