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 15 goals in 93 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 Ayutthaya United, where he scored 5 goals in 27 appearances.
