| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| — | J3-League | 3 | 197 | 0 | 0 | 0 | 7 |
| 2023 | J2-League | 8 | 378 | 0 | 0 | 0 | — |
| 2024 | J2-League | 24 | 1452 | 0 | 1 | 0.06 | — |
| 2025 | J2-League | 23 | 582 | 1 | 0 | 0.15 | 6.4 |
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.
Cohort: 16 J2-League defenders, 2025, min. 450 minutes. Computed by ranking the full league corpus, not taken from any feed.
Figures computed from the GioScore season-stats database · as of 2026-08-23
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Vegalta Sendai | 4 | 1 | 3 | 0 | 0 | 0 | 0 | 1 |
 JEF United | 3 | 0 | 0 | 3 | 0 | 0 | 0 | 0 |
 Renofa Yamaguchi | 3 | 2 | 0 | 1 | 1 | 0 | 0 | 0 |
 Montedio Yamagata | 3 | 1 | 0 | 2 | 0 | 0 | 0 | 0 |
 Blaublitz Akita | 3 | 1 | 0 | 2 | 0 | 0 | 0 | 0 |
 Sagan Tosu | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 Ventforet Kofu | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
 Shimizu S-Pulse | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Tokushima Vortis | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Fagiano Okayama | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 1 |
 Júbilo Iwata | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Imabari | 2 | 0 | 0 | 2 | 1 | 0 | 0 | 0 |
 Roasso Kumamoto | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
 Ehime | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Mito Hollyhock | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
 Iwaki | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Omiya Ardija | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 0 |
 Yokohama | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Consadole Sapporo | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 V-Varen Nagasaki | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
Kotaro Yamahara finished the 2025 J2-League with 1 goal from 23 appearances (582 minutes), with no assists recorded — 0.15 goal involvements per 90. That season graded out at an average match rating of 6.4. Against the 16 J2-League defenders who played 450+ minutes in 2025, his match rating places in the 44th percentile; for goals scored he stands 6th of 16.
