Itō gave her debut in the Ski Jumping Continental Cup on March 5, 2007 on the Zaō hill in Yamagata . In her third competition in Sapporo , she surprisingly managed to make it onto the podium for the first time with third place. However, it remained the last podium for a long time. At the Junior World Championships in Zakopane in 2008 , she reached 18th place on the normal hill . A year later at the Junior World Championships in 2009 in Štrbské Pleso , she jumped to 10th place. The 2008/09 season ended as the most successful season to date in 25th place in the overall Continental Cup standings. In Liberec she reached 17th place on the normal hill at the Nordic World Ski Championships in 2009 . In 2009 Itō increased their performance and again reached third place on August 22, 2009 in Lillehammer . In jumping from the normal hill at the Junior World Championships 2010 in Hinterzarten , she jumped to 17th place. At the end of the Continental Cup season 2009/10 she finished 27th.
In the 2016/17 season Itō celebrated her first World Cup victory on the Miyanomori hill in Sapporo, which was followed by two more the following weekend in Yamagata. At the “Olympic dress rehearsal” on the normal hill in the Alpensia Jumping Park in Pyeongchang , she achieved her number four win of the season. At the Nordic World Ski Championships 2017 in Lahti , she was next to Sara Takanashi as the biggest favorite, but had to admit defeat to Carina Vogt, like two years earlier. After the first run she was still in the lead. In the mixed team competition, she won the bronze medal together with Sara Takanashi, Taku Takeuchi and Daiki Itō, just like two years earlier. She won her fifth win of the season at the World Cup final in Oslo . She finished second in the overall World Cup behind Sara Takanashi with 1208 points and thus achieved her best career result to date.
At the 2019 World Championships in Seefeld in Tirol , she was 15th in the individual competition and was fifth (mixed) and sixth (women) with the Japanese teams in the team competitions.
Private
After graduating from school, she joined the real estate company Tsuchiya Home , for whose ski team she has been competing ever since.