Koga played with the Kumamoto Shin-ai Girls' High School team, winning the 2011 All-Japan Junior High School championship and receiving the Excellent Player award.
2012
She won the gold medal at the 2012 Asian Youth Girls Championship claimed by her National Junior team and she also won the Most Valuable Player award and Best Scorer of the tournament.
2013
Sarina Koga (古賀 紗理那) is a Japanese volleyball player who won the bronze medal at the 2013 U23 World Championship with the Japan's U23 national team.
Koga played for the senior national team for the first time at the Alassio Cup in May 2013.
In October 2013, Koga competed in the 2013 FIVB Women's U23 Volleyball World Championship and won the bronze medal.
Koga was named one of the best outside hitters.
2015
On 23 Jan 2015 NEC Red Rockets announced her joining the team.
On 31 December 2022, Koga announced her marriage to the Japan Men's Volleyball Team Opposite Hitter, Yuji Nishida.
2016
■ 2016 / 17V · Premier League Women's Commendation Player List
2020
She also competed at the 2020 Summer Olympics, in Women's volleyball.
