Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Chonburi FC | 3 | 1 | 0 | 2 | 0 | 0 | 1 | 0 |
 Kasetsart | 3 | 2 | 0 | 1 | 1 | 0 | 0 | 0 |
 New Radiant | 2 | 0 | 0 | 2 | 1 | 0 | 0 | 0 |
 Navy | 2 | 2 | 0 | 0 | 1 | 0 | 0 | 0 |
 Suphanburi Football Club | 2 | 0 | 1 | 1 | 1 | 0 | 0 | 0 |
 Chainat Hornbill | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
 Pattaya United | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Nakhon Si Thammarat | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 Chiangmai United | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 Bengaluru | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Walton Casuals | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Tooting & Mitcham United | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Port FC | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Police Tero FC | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Super Power Samut Prakan | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Buriram United | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
 Nakhonratchasima Mazda FC | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Singha Chiangrai United | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Aguias do Moradal | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Chiangmai | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
Player stats against each opponent national team
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Israel U19 W | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Faroe Islands U19 W | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
Seiya Kojima is a professional midfielder. Seiya Kojima has scored 14 goals in 83 professional appearances across 6 clubs. Among the clubs he has represented — Bangkok, Suphanburi Football Club, Ayutthaya United, Ubon UMT — Seiya Kojima was most prolific at Ubon UMT, where he scored 4 goals in 20 appearances.
Seiya Kojima's professional career spans from 2017 to 2025, a period of roughly 8 seasons over which he has amassed 83 appearances spread across 6 clubs. With 14 goals and 0 assists recorded across that span, his record reflects a sustained contribution at the highest level.
His most productive season in attacking terms came in 21/22 with Ayutthaya United, when he registered 4 goals and 0 assists in 17 matches, playing 1524 minutes. That campaign stands out as one of the high points of his output.
In his most recent recorded season (24/25) at Bangkok, Seiya Kojima played 16 matches, scoring 2 goals and providing 0 assists.
| Club | Period | Apps | Goals | Assists | Minutes | YC | RC | Rating |
|---|---|---|---|---|---|---|---|---|
| Bangkok | 2023/2024 - 2025/2026 | 20 | 2 | 0 | 988 | — | — | — |
| Ubon UMT | 2017/2018 - 2018/2019 | 20 | 4 | 0 | 1245 | — | — | — |
| Suphanburi Football Club | 2022/2023 | 18 | 3 | 0 | 1212 | — | — | — |
| Ayutthaya United | 2021/2022 | 17 | 4 | 0 | 1524 | — | — | — |
| Navy | 2016/2017 | 5 | 1 | 0 | 137 | — | — | — |
| Abahani Chittagong | 2017/2018 | 3 | 0 | 0 | 270 | — | — | — |
| Total | 83 | 14 | 0 | 5376 |
| Season | Club | Apps | Goals | Assists | Minutes | YC | RC | Rating |
|---|---|---|---|---|---|---|---|---|
| 24/25 | Bangkok | 16 | 2 | — | 688 | 2 | 0 | — |
| 23/24 | Bangkok | 4 | 0 | — | 300 | 1 | 0 | — |
| 22/23 | Suphanburi Football Club | 18 | 3 | — | 1212 | 0 | 0 | — |
| 21/22 | Ayutthaya United | 17 | 4 | — | 1524 | 0 | 0 | — |
| 18/19 | Ubon UMT | 10 | 2 | — | 661 | 0 | 0 | — |
| 17/18 | Ubon UMT | 10 | 2 | — | 584 | 0 | 0 | — |
| 17/18 | Abahani Chittagong | 3 | 0 | — | 270 | 0 | 0 | — |
| 16/17 | Navy | 5 | 1 | — | 137 | 1 | 0 | — |
