| Siosaia Fifita | |
| Fullname: | Siosaia Ofa Ki Vahanoa Fifita |
| Birth Date: | 20 December 1998 |
| Birth Place: | Nukuʻalofa, Tonga |
| Height: | 1.870NaN0 |
| Weight: | 1100NaN0 |
| University: | Tenri University |
| Position: | Wing, Centre |
| Currentclub: | Kintetsu Liners |
| Years1: | 2020 |
| Clubs1: | Sunwolves |
| Apps1: | 6 |
| Points1: | 10 |
| Years2: | 2023– |
| Clubs2: | Kintetsu Liners |
| Apps2: | 13 |
| Points2: | 30 |
| Repyears1: | 2018–2019 |
| Repteam1: | Junior Japan |
| Repcaps1: | 6 |
| Reppoints1: | 10 |
| Repyears2: | 2018 |
| Repteam2: | Japan U20 |
| Repcaps2: | 5 |
| Reppoints2: | 10 |
| Repyears3: | 2021– |
| Repteam3: | Japan |
| Repcaps3: | 12 |
| Reppoints3: | 25 |
| Clubupdate: | 28 August 2023 |
| Repupdate: | 28 August 2023 |
is a professional rugby union player who plays as a wing for Japan Rugby League One club Kintetsu Liners. Born in Tonga, he represents Japan at international level after qualifying on residency grounds.[1] [2] [3]