| Junya Koga | |
| Fullname: | Junya Koga |
| Strokes: | Backstroke |
| Birth Date: | 19 July 1987 |
| Birth Place: | Kumagaya, Saitama Prefecture, Japan |
| Height: | 1.81 m |
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.[1]
In long course