[7] Higashino was born in Iwamizawa, graduated from the Tomioka Senior High School, and joined the Unisys team in 2015.

[10][11] In June 2014, she made his first appearance in the senior international event at the Japan Open, competed in the mixed doubles with Watanabe, but the duo was defeated in the first round.

She reached her first final in the senior international event at the 2015 Russian Open a BWF Grand Prix tournament, where she and her partner Watanabe defeated by Chan Peng Soon and Goh Liu Ying.

[12] In 2016, Higashino won her first senior title at Vietnam International Challenge in the mixed doubles paired-up with Watanabe.

[13] In 2017, Higashino and Watanabe have sufficient ranking points to entered the Superseries stage, and able to reached the semi-finals in the All England Open.

[17] Besides that, the duo finished in the semi-finals at the Malaysia, Japan, French, and Fuzhou China Opens;[18][19][20][21] as well in the year-end tournament BWF World Tour Finals.

[46][47] Higashino and Watanabe then reached their career high as world number 1 in the BWF mixed doubles ranking on 8 November 2022.

[49] In the following week, they emerged as a champion in the India Open, after their opponent Wang Yilyu and Huang Dongping withdrawn from the final match.

[50] In March, they unable to defend their All England Open title, since Watanabe struggling with injury in the second round against Kim Won-ho and Jeong Na-eun.

[58] They clinched the bronze medal in the World Championships defeating by Seo Seung-jae and Chae Yoo-jung in the semi-finals.

[59] She competed in the 2022 Asian Games, won a silver in the mixed doubles and a gold in the women's team event.