| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2020 | J1 League | 17 | 1392 | 0 | 0 | 0 | 6.92 |
| 2021 | J1 League | 29 | 2079 | 0 | 0 | 0 | 6.85 |
| 2022 | J1 League | 25 | 1777 | 0 | 0 | 0 | 6.91 |
| 2023 | J1 League | 21 | 1591 | 0 | 0 | 0 | 6.62 |
| 2024 | J1 League | 3 | 266 | 0 | 0 | 0 | 7.24 |
| 2025 | J1 League | 17 | 1378 | 1 | 0 | 0.07 | 6.78 |
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 2026-07-27
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 FC Tokyo | 6 | 2 | 2 | 2 | 0 | 0 | 1 | 0 |
 Yokohama | 4 | 2 | 0 | 2 | 0 | 0 | 0 | 0 |
 Sanfrecce Hiroshima | 4 | 1 | 0 | 3 | 0 | 0 | 0 | 0 |
 Avispa Fukuoka | 3 | 0 | 1 | 2 | 0 | 0 | 0 | 0 |
 Shimizu S-Pulse | 3 | 1 | 0 | 2 | 0 | 0 | 1 | 0 |
 Kawasaki Frontale | 3 | 0 | 1 | 2 | 1 | 0 | 1 | 0 |
 Fagiano Okayama | 3 | 1 | 1 | 1 | 0 | 0 | 2 | 0 |
 Kashiwa Reysol | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Sagan Tosu | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Tokyo Verdy | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Kyoto Sanga | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 Albirex Niigata | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Cerezo Osaka | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
 Kashima Antlers | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Vissel Kobe | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Júbilo Iwata | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Machida Zelvia | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Gamba Osaka | 2 | 0 | 1 | 1 | 0 | 0 | 1 | 1 |
 Urawa Reds | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Tokushima Vortis | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
All of Koki Tachi's 2025 J1 League output came as goals: 1 goal in 17 games (1,378 minutes) — 0.07 goal involvements per 90. Per-match rating over the season: 6.78.
6 league seasons sit on his record, from 2020 to 2025, all with a single club. No season rated higher than 2020 (6.92, J1 League); none lower than 2023 (6.62). His last two rated seasons average 0.19 below his earlier career level.
