Attacking · Shimizu S-pulse · season-by-season, by competition, and every match.
Kozuka is operating at his career peak — the 2025/26 level is the level.
The record covers 5 seasons (2020/21–2025/26) across 4 clubs, including a move abroad — 50 appearances, 4 goals and 3 assists.
His best campaign on record is 2025/26 at Shimizu S-pulse — Season rating 6, 2 goals and 0 assists in 17 games. Output has held steady across his last 3 full seasons (5 → 6).
Season-to-season output barely moves — his form has stayed within a tight band (±1 points) across 4 campaigns.
| Season | Club | Apps | G | A | Rating | Season |
|---|---|---|---|---|---|---|
| 2025/26 | Shimizu S-pulse | 17 | 2 | 0 | 19 | 6 |
| 2023/24 | Suwon Bluewings | 8 | 1 | 0 | 27 | 5 |
| 2022/23 | Kawasaki Frontale | 12 | 0 | 2 | 36 | 5 |
| 2021/22 | Kawasaki Frontale | 5 | 0 | 0 | 38 | 1 |
| 2020/21 | Oita Trinita | 8 | 1 | 1 | 44 | 6 |
| Competition | Apps | Min | G | A | Rating |
|---|---|---|---|---|---|
| J1 League | 17 | 437 | 2 | 0 | 6.8 |
| J-League Cup | 1 | 61 | 0 | 0 | — |
| Date | Competition | Opponent | Res | Status | Min | G | A | Rating |
|---|---|---|---|---|---|---|---|---|
| Feb 16 | J1 League | A Tokyo Verdy | 1-0 | Not in squad | — | |||
| Feb 22 | J1 League | H Albirex Niigata | 2-0 | Played | 20 | 6.9 | ||
| Feb 26 | J1 League | H Sanfrecce Hiroshima | 1-1 | Played | 9 | 7.2 | ||
| Mar 2 | J1 League | A Fagiano Okayama | 1-1 | Played | 1 | — | ||
| Mar 8 | J1 League | A Gamba Osaka | 0-1 | Played | 45 | 6.9 | ||
| Mar 16 | J1 League | H Kyoto Sanga | 1-2 | Played | 17 | 6.7 | ||
| Mar 26 | J-League Cup | A Sagamihara | 3-1 | Not in squad | — | |||
| Mar 29 | J1 League | H Shonan Bellmare | 3-0 | Played | 11 | 6.3 | ||
| Apr 2 | J1 League | A Urawa | 1-2 | Not in squad | — | |||
| Apr 6 | J1 League | A Yokohama FC | 0-2 | Not in squad | — | |||
| Apr 9 | J-League Cup | A Jubilo Iwata | 1-2 | Not in squad | — | |||
| Apr 12 | J1 League | H Kawasaki Frontale | 1-1 | Not in squad | — | |||
| Apr 16 | J1 League | A Yokohama F. Marinos | 3-2 | Not in squad | — | |||
| Apr 20 | J1 League | H Avispa Fukuoka | 3-1 | Not in squad | — | |||
| Apr 29 | J1 League | A FC Tokyo | 2-0 | Not in squad | — | |||
| May 3 | J1 League | H Nagoya Grampus | 0-3 | Not in squad | — | |||
| May 6 | J1 League | A Kashiwa Reysol | 0-1 | Not in squad | — | |||
| May 11 | J1 League | H Machida Zelvia | 2-2 | Not in squad | — | |||
| May 17 | J1 League | A Kashima | 0-1 | Played | 13 | 6.9 | ||
| May 18 | Friendlies Clubs | H Ventforet Kofu | 1-1 | Not in squad | — | |||
| May 25 | J1 League | H Vissel Kobe | 3-2 | Played | 12 | 6.3 | ||
| Jun 1 | J1 League | A Cerezo Osaka | 2-4 | Played | 22 | 7.0 | ||
| Jun 11 | Emperor Cup | H Matsumoto Yamaga | 4-2 | Not in squad | — | |||
| Jun 15 | J1 League | H Gamba Osaka | 0-0 | Not in squad | — | |||
| Jun 21 | J1 League | A Nagoya Grampus | 1-1 | Not in squad | — | |||
| Jun 28 | J1 League | H Kashiwa Reysol | 0-2 | Not in squad | — | |||
| Jul 5 | J1 League | A Machida Zelvia | 0-3 | Not in squad | — | |||
| Jul 16 | Emperor Cup | A Shonan Bellmare | 1-0 | Not in squad | — | |||
| Jul 20 | J1 League | H Yokohama FC | 2-0 | Not in squad | — | |||
| Aug 6 | Emperor Cup | A Sanfrecce Hiroshima | 0-3 | Not in squad | — | |||
| Aug 10 | J1 League | A Sanfrecce Hiroshima | 0-0 | Not in squad | — | |||
| Aug 16 | J1 League | H Yokohama F. Marinos | 1-3 | Not in squad | — | |||
| Aug 23 | J1 League | A Avispa Fukuoka | 0-0 | Not in squad | — | |||
| Aug 31 | J1 League | H Kashima | 1-1 | Played | 9 | 6.5 | ||
| Sep 13 | J1 League | A Albirex Niigata | 1-0 | Unused sub | 0 | — | ||
| Sep 20 | J1 League | A Kyoto Sanga | 1-0 | Played | 20 | 6.6 | ||
| Sep 23 | J1 League | H Urawa | 0-0 | Played | 56 | 6.9 | ||
| Sep 27 | J1 League | A Vissel Kobe | 1-2 | Played | 60 | 1 | 7.2 | |
| Oct 4 | J1 League | H FC Tokyo | 1-1 | Played | 67 | 7.2 | ||
| Oct 18 | J1 League | A Kawasaki Frontale | 3-5 | Played | 45 | 1 | 7.6 | |
| Oct 25 | J1 League | H Tokyo Verdy | 1-0 | Unused sub | 0 | — | ||
| Nov 9 | J1 League | H Cerezo Osaka | 1-4 | Unused sub | 0 | — | ||
| Nov 30 | J1 League | A Shonan Bellmare | 0-1 | Played | 20 | 6.9 | ||
| Dec 6 | J1 League | H Fagiano Okayama | 1-2 | Played | 10 | 6.5 |