Sarina Koga

or is a Japanese retired volleyball player who used to be captain of the Japan women's national volleyball team.

Koga won the bronze medal at the 2013 U23 World Championship with Japan's U23 national team. She also competed at the 2020 Summer Olympics, in women's volleyball. Koga retired after the 2024 Summer Olympics.

Career 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. She won the gold medal at the 2012 Asian Youth Girls Championship as part of the National Junior team; she also won the Most Valuable Player award at and Best Scorer of the tournament.

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 spikers, and selected for the competition's all star team, by the FIVB website.

On 23 January 2015, NEC Red Rockets announced her joining the team.

Koga won a silver medal in the 2024 VNL. She announced in July 2024 that the 2024 Paris Olympics would be her final tournament as her decision of retirement. On July 24, 2025, it was announced through a post in Nishida's official social media account that they are expecting their first child. Koga's husband announced that she has given birth to their first child on December 8, 2025.

Awards

Individuals 2011 All-Japan Junior High School Championship - Excellent Player Award 2012 Asian Youth Girls U17 Volleyball Championship (AVC) in Chengdu, China - Best Scorer and MVP 2013 All-Japan High School Championship - Excellent Player Award 2013 FIVB Women's U23 Volleyball World Championship in Tijuana, Mexico - Best Outside Hitter 2015/16 Japan V.Premier League - Best Newcomer Award (Rookie of the Year) 2016 Asian Women's Club Volleyball Championship (AVC) in Biñan City, Philippines - MVP (Most Valuable Player) 2016/17 Japan V.Premier League - Best6 and MVP (Most Valuable Player) 2020/21 Japan V.League - Best6 2022 Japan Emperor's Cup and Empress' Cup All Japan Volleyball Championship - MVP (Most Valuable Player) 2022/23 Japan V.League - Best6, Best Server and MVP (Most Valuable Player) 2023 Japan Emperor's Cup and Empress' Cup All Japan Volleyball Championship - MVP (Most Valuable Player) 2023/24 Japan V.League - Best6 and MVP (Most Valuable Player) 2024 FIVB Volleyball Nations League in Bangkok, Thailand - Best Outside Hitter

Team

2020/21 Japan V.League - Image:Med 3.png Bronze medal - NEC Red Rockets

National Team

2013 FIVB Women's U23 World Championship in Tijuana, Mexico - Image:Med 3.png Bronze medal 2014 Asian Junior Women's U19 Volleyball Championship (AVC) in Chinese Taipei - Image:Med 2.png Silver medal 2015 Montreux Volley Masters in Switzerland - Image:Med 2.png Silver medal

2024 FIVB Volleyball Nations League (VNL) in Bangkok, Thailand - Image:Med 2.png Silver medal