| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2020 | J2-League | 8 | 570 | 0 | 0 | 0 | — |
| 2022 | J2-League | 21 | 1186 | 0 | 2 | 0.15 | — |
| 2023 | J2-League | 20 | 1184 | 0 | 0 | 0 | — |
| 2024 | J2-League | 12 | 506 | 0 | 1 | 0.18 | — |
| 2025 | J2-League | 22 | 1020 | 0 | 2 | 0.18 | 6.36 |
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: 23 J2-League midfielders, 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 2026-07-28
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 closed the 2025 J2-League with 2 assists, without scoring, over 22 appearances (1,020 minutes) — 0.18 goal involvements per 90. His average match rating for that season computes to 6.36. Ranked among 23 J2-League midfielders with at least 450 minutes in 2025, he lands in the 0th percentile for goal involvements per 90; on goals he ranks 16th of 23.
His league record spans 5 seasons (2020–2025), all with a single club.
