is a Japanese backstroke swimmer. He is a Waseda University student in Tokyo.
In May 2009, he set the Japanese records in the 50 m and 100 m backstrokes at the 2009 Japan Championships, qualifying for Japan's team to the 2009 World Championships.Taking on the world! Great expectations placed on Waseda swimmer Mr. Junya Koga, from Waseda Weekly, issue 1189 (English version); retrieved 2009-07-29.
Personal bests In long course 50m backstroke 24.24 Asian record (August 1, 2009) 100m backstroke 52.26 (July 28, 2009)
References
Koga's profile from TV Asahi; retrieved 2009-07-29.
External links JunyaKoga official site official blog(じゅんやこがの夢のような日記)