| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2014 | J1 League | 10 | 630 | 0 | 0 | 0 | — |
| 2015 | J1 League | 11 | — | 0 | 0 | — | — |
| 2016 | J1 League | 30 | 2008 | 0 | 0 | 0 | 6.89 |
| 2017 | J1 League | 33 | 2935 | 2 | 1 | 0.09 | 6.94 |
| 2018 | J1 League | 27 | 1964 | 1 | 1 | 0.09 | 6.85 |
| 2019 | J1 League | 7 | 541 | 0 | 0 | 0 | 7.02 |
| 2020 | J1 League | 22 | 1702 | 1 | 1 | 0.11 | 6.96 |
| 2021 | J1 League | 28 | 1542 | 0 | 0 | 0 | 6.88 |
| 2022 | J1 League | 30 | 2623 | 1 | 2 | 0.1 | 7.09 |
| 2023 | J1 League | 33 | 2721 | 1 | 0 | 0.03 | 6.84 |
| 2024 | J1 League | 35 | 2515 | 1 | 3 | 0.14 | 6.98 |
| 2025 | J1 League | 30 | 1696 | 1 | 2 | 0.16 | 6.86 |
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 | ||
|---|---|---|---|---|---|---|---|---|
 Avispa Fukuoka | 8 | 4 | 1 | 3 | 0 | 0 | 1 | 0 |
 Cerezo Osaka | 8 | 2 | 5 | 1 | 0 | 0 | 0 | 0 |
 Shonan Bellmare | 7 | 1 | 3 | 3 | 0 | 0 | 1 | 0 |
 Kashima Antlers | 6 | 0 | 0 | 6 | 1 | 0 | 1 | 0 |
 Urawa Reds | 5 | 4 | 0 | 1 | 0 | 0 | 0 | 0 |
 Nagoya Grampus | 5 | 4 | 0 | 1 | 0 | 0 | 1 | 0 |
 Sanfrecce Hiroshima | 5 | 0 | 2 | 3 | 0 | 0 | 1 | 0 |
 Gamba Osaka | 5 | 2 | 1 | 2 | 0 | 0 | 1 | 0 |
 Kashiwa Reysol | 4 | 1 | 1 | 2 | 0 | 0 | 1 | 0 |
 Yokohama F. Marinos | 4 | 1 | 1 | 2 | 0 | 0 | 0 | 0 |
 Kyoto Sanga | 4 | 1 | 0 | 3 | 0 | 0 | 2 | 0 |
 Shimizu S-Pulse | 4 | 1 | 2 | 1 | 0 | 1 | 0 | 0 |
 Kawasaki Frontale | 4 | 1 | 0 | 3 | 0 | 0 | 0 | 0 |
 Machida Zelvia | 4 | 0 | 0 | 4 | 0 | 0 | 0 | 0 |
 Sagan Tosu | 3 | 2 | 0 | 1 | 0 | 0 | 0 | 0 |
 Yokohama | 3 | 2 | 1 | 0 | 0 | 0 | 1 | 0 |
 Consadole Sapporo | 3 | 3 | 0 | 0 | 0 | 0 | 1 | 0 |
 Tokyo Verdy | 3 | 1 | 2 | 0 | 0 | 0 | 0 | 0 |
 Albirex Niigata | 3 | 2 | 1 | 0 | 1 | 3 | 0 | 0 |
 Vissel Kobe | 3 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
The 2025 J1 League line for Kei Koizumi: 30 appearances (1,696 minutes), 1 goal, 2 assists — 0.16 goal involvements per 90. Per-match rating over the season: 6.86.
The database holds 12 league seasons for him, from 2014 to 2025 across 5 clubs. At his best he averaged 7.09 in 2022, J1 League; at his worst, 6.84 in 2023.
