| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2014 | J1 League | 2 | — | 0 | 0 | — | — |
| 2016 | J1 League | 6 | 338 | 0 | 0 | 0 | — |
| 2017 | J2-League | 39 | 1864 | 8 | 0 | 0.39 | — |
| 2018 | J2-League | 31 | 2430 | 6 | 1 | 0.26 | — |
| 2019 | J1 League | 33 | 2584 | 1 | 5 | 0.21 | 7.06 |
| 2020 | J1 League | 8 | 379 | 1 | 1 | 0.47 | 6.93 |
| 2021 | J1 League | 5 | 73 | 0 | 0 | — | 7.04 |
| 2022 | J1 League | 12 | 275 | 0 | 2 | 0.65 | 6.98 |
| 2023 | J1 League | 5 | 105 | 0 | 0 | 0 | 6.45 |
| 2023 | K League 1 | 16 | 1284 | 1 | 2 | 0.21 | 6.66 |
| 2024 | K League 2 | 31 | 2042 | 1 | 5 | 0.26 | — |
| 2025 | J1 League | 17 | 429 | 2 | 0 | 0.42 | 6.87 |
Domestic league competitions only (SportMonks sub_type='domestic'); national-team, continental and cup competitions are excluded. Classification resolved by league id against the canonical leagues index. G+A/90 computed from minutes actually played.
Figures computed from the GioScore season-stats database · as of 2026-07-31
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Shonan Bellmare | 3 | 1 | 0 | 2 | 1 | 0 | 0 | 0 |
 Tokushima Vortis | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 |
 Jeonnam Dragons | 3 | 0 | 2 | 1 | 0 | 0 | 0 | 0 |
 Chungnam Asan | 3 | 0 | 0 | 3 | 0 | 0 | 0 | 1 |
 Urawa Reds | 2 | 0 | 1 | 1 | 1 | 0 | 0 | 0 |
 Yokohama | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Busan I'Park | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
 Seongnam | 2 | 2 | 0 | 0 | 0 | 2 | 0 | 0 |
 Albirex Niigata | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 Cerezo Osaka | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Kashima Antlers | 2 | 0 | 1 | 1 | 0 | 0 | 1 | 0 |
 Ulsan HD | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Fagiano Okayama | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 Ansan Greeners | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 Daegu | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Bucheon 1995 | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Gyeongnam | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
 Anyang | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Cheongju | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 Gimpo | 2 | 1 | 0 | 1 | 1 | 0 | 0 | 0 |
Kazuki Kozuka scored 2 goals in 17 J1 League appearances in 2025 (429 minutes), without an assist — 0.42 goal involvements per 90. Per-match rating over the season: 6.87.
Between 2014 and 2025 he accumulated 12 league seasons across 8 clubs. No season rated higher than 2019 (7.06, J1 League); none lower than 2023 (6.45).
