| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2022 | J2-League | 11 | 606 | 0 | 1 | 0.15 | — |
| 2023 | J2-League | 9 | 312 | 0 | 0 | 0 | — |
| 2024 | J2-League | 10 | 190 | 0 | 0 | 0 | — |
| 2025 | J2-League | 12 | 65 | 0 | 2 | — | — |
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: 105 J2-League midfielders, 2022, 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 2026-07-08
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Fujieda MYFC | 5 | 2 | 2 | 1 | 0 | 0 | 0 | 0 |
 Vegalta Sendai | 4 | 0 | 3 | 1 | 0 | 0 | 0 | 0 |
 Renofa Yamaguchi | 4 | 2 | 0 | 2 | 0 | 0 | 0 | 0 |
 Omiya Ardija | 3 | 2 | 0 | 1 | 0 | 0 | 0 | 0 |
 Mito Hollyhock | 3 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
 Sagan Tosu | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Vissel Kobe | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Tokushima Vortis | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Ulsan HD | 2 | 0 | 0 | 2 | 0 | 1 | 0 | 0 |
 Júbilo Iwata | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 V-Varen Nagasaki | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 ThespaKusatsu Gunma | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
 Oita Trinita | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
 Montedio Yamagata | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Ehime | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 0 |
 Kataller Toyama | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Zweigen Kanazawa | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 Ryūkyū | 2 | 1 | 1 | 0 | 0 | 0 | 1 | 0 |
 Iwaki | 2 | 1 | 1 | 0 | 0 | 0 | 1 | 0 |
 Fukui United | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
Iwana Kobayashi finished the 2025 J2-League season with 2 assists and no goals from 12 appearances (65 minutes). Measured against 105 J2-League midfielders with at least 450 minutes in 2022, he ranks in the 59th percentile by goal involvements per 90 — above the cohort median; on goals he ranks 51st of 105.
His league record spans 4 seasons (2022–2026), all with a single club.
| Club | Period | Apps | Goals | Assists | Minutes | YC | RC | Rating |
|---|---|---|---|---|---|---|---|---|
| Ventforet Kofu | 2018/2019 - now | 64 | 0 | 5 | 1930 | — | — | 6.66 |
| Total | 64 | 0 | 5 | 1930 |
| Season | Club | Apps | Goals | Assists | Minutes | YC | RC | Rating |
|---|---|---|---|---|---|---|---|---|
| 24/25 | Ventforet Kofu | 25 | 0 | — | 329 | 1 | 0 | — |
| 23/24 | Ventforet Kofu | 17 | 0 | — | 547 | 0 | 0 | 6.66 |
| 22/23 | Ventforet Kofu | 11 | 0 | — | 448 | 0 | 0 | — |
| 21/22 | Ventforet Kofu | 11 | 0 | — | 606 | 1 | 0 | — |
