Iwabuchi has been participating in the TTR World Snowboard Tour competitions since 2010 and in the FIS competitions since 2015 . At the Junior World Championships 2015 in Yabuli , she achieved 19th place in slopestyle. In April 2015 she came second in the Slopestyle at the Völkl World Rookie Final in Ischgl . In 2015 and 2016 she became the Japanese champion in slopestyle.
At the 2017 Junior World Championships in Špindlerův Mlýn , she won silver in both slopestyle and big air. At the beginning of the 2017/18 season, she started in Cardrona for the first time in the snowboard world cup and finished fourth in slopestyle. In December 2017, she won her first World Cup victory in Big Air in Copper Mountain . The following month she finished second in the Slopestyle World Cup in Snowmass and won the silver medal in Big Air at the Winter X Games in Aspen . She also finished fifth there in Slopestyle. At the 2018 Winter Olympics in Pyeongchang in Big Air, which was held for the first time as part of the Olympic snowboarding competitions, she came fourth behind Anna Gasser on February 22nd and 14th in slopestyle. At the X-Games Norway 2018 in Fornebu , she came fifth in Big Air and at the end of the season she finished fifth in the Freestyle World Cup and second in the Slopestyle World Cup.
At the beginning of the 2018/19 season, Iwabuchi won her second and third World Cup victory in Big Air in Cardrona and Modena . She also took second place in the Slopestyle at the Secret Garden Ski Resort , winning the Big Air World Cup. In the Freestyle and Slopestyle World Cup, she came in second. She finished sixth in slopestyle at the 2019 Winter X-Games and fifth in slopestyle at the 2019 Snowboard World Championships in Park City . After finishing sixth in Big Air in Cardrona at the beginning of the 2019/20 season, she won Big Air in Modena and Atlanta and came second in Slopestyle in Laax . As in the previous year, she won the Big Air World Cup and took third place in the Freestyle World Cup. At the Winter X Games 2020 , she won the bronze medal in Big Air.
Japan
World cup
