Nakaji moved from Kyoto to Saitama to train at the Toda City Sports Center under coach Risa Sugawara.[3] She became age-eligible for senior competitions in 2016. She finished 12th in the all-around at both the 2016 All-Japan Championships and NHK Trophy.[4][5]
Nakaji competed at the 2017 WOGA Classic in Frisco, Texas, and finished 11th in the all-around.[6] She finished fourth in the all-around at the 2017 All-Japan Championships and had the second-highest score on the balance beam, behind Mai Murakami.[7] Then at the 2017 NHK Trophy, she finished fifth in the all-around[8] She placed seventh on the balance beam and sixth on the floor exercise at the All-Japan Event Championships.[9] She was not selected to compete at the 2017 World Championships.[10]
Nakaji finished eighth in the all-around at the 2018 All-Japan Championships and placed third on the balance beam behind Murakami and Asuka Teramoto.[11] She also finished eighth at the NHK Trophy.[12] She represented Japan at the 2018 Asian Games and helped her team win a bronze medal in the team event behind China and North Korea. She finished sixth in the all-around, the highest finisher from Japan, with a total score of 51.250. She qualified for the balance beam final and finished in fourth place. Then in the floor exercise final, she won the bronze medal behind Kim Su-jong and Rifda Irfanaluthfi.[2][13][14]
Nakaji finished 22nd in the all-around at the 2019 All-Japan Championships.[15] She then finished 18th at the NHK Trophy.[16] She has not competed since 2019.[17]
Japan
Japan
