2021 Shinoya and
Kyohei Yamashita made their Super 750 debut at the
Indonesia Masters, where they were eliminated in the first round. The following week, they advanced to the second round at the
Indonesia Open, marking their Super 1000 debut. The pair concluded the season by capturing the mixed doubles bronze medal at the
2021 World Championships in Huelva, Spain, following a semifinal defeat to compatriots
Yuta Watanabe and
Arisa Higashino.
2022–2023 Shinoya and Yamashita's best results on the 2022
World Tour were quarterfinal finishes at the
Denmark Open and
Australian Open. They ended the year by reaching their career-best world ranking of No. 13. In 2023, Shinoya helped Japan win a bronze medal at the
Sudirman Cup. On the World Tour, she and Yamashita reached the quarterfinals of the
All England Open and the semifinals of the
German Open and the
Canada Open.
2024 In the first half of 2024, Shinoya and Yamashita competed in mixed doubles to qualify for the
2024 Paris Olympics. Their best World Tour result was a quarterfinal finish at the
Thailand Masters. After failing to secure Olympic qualification, Shinoya retired from the national team in April, ending her partnership with Yamashita. Continuing to compete for her corporate team, NTT East, Shinoya partnered with
Nao Yamakita in women's doubles and won the
Malaysia International in September. == Coaching career ==