[1] She was a member of Japan women's national volleyball team and participated at the 2016 Summer Olympics.

In 2010, she made her senior international debut, taking part in the Asian Cup with the national B-team; as well as beginning her professional career with Hisamitsu Springs.

[4] In March 2017, she suffered an injury to her left anterior cruciate ligament which kept her from playing for over thirteen months,[5] causing her to miss the entire 2017-18 season.

[4] They won the Italian Super Cup, making her the first Japanese player to play and win a title with the club.

[7] Nagaoka was back on court in 2020,[8] but missed the 2020 Summer Olympics due to a knee injury.