Domestic-league season · Jagiellonia.
| Competition | Apps | G | A | Min | Match |
|---|---|---|---|---|---|
 Ekstraklasa | 14 | 1 | 0 | 1048 | 6.91 |
 UEFA Europa Conference League | 5 | 0 | 0 | 185 | 7.03 |
Following his move to Jagiellonia, Kobayashi's current-season form is up 100% on last season (Season 5→10), while his Rating eased 39→31. His peak season for form remains 2022/23 (Season 38).
| Season | Club | Apps | G | A | Match | RTG | Season |
|---|---|---|---|---|---|---|---|
| 2025/26 | Jagiellonia · 3rd | 14 | 1 | 0 | 6.91 | 31 | 10 |
| 2024/25 | Portimonense · 15th | 3 | 0 | 0 | 6.63 | 39 | 5 |
| 2022/23 | Vissel Kobe · 13th | 32 | 0 | 0 | 6.86 | 54 | 38 |
| 2021/22 | Vissel Kobe · 3rd | 22 | 0 | 0 | 6.9 | 52 | 25 |
| 2020/21 | Yokohama FC · 15th | 28 | 2 | 0 | 6.8 | 53 | 21 |
Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year.
Y. Kobayashi is a 26-year-old central defender at Jagiellonia, rated 31 overall by Field Insider's model, ranking 154th of 332 in the Ekstraklasa. In his prime years, he has been a fringe squad member this season (34.2% of available minutes). His defensive output reads 2.15 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Kobayashi.
Judged on this season alone, Kobayashi graded 10 — a workmanlike campaign that ranks 44th of 49 of the 49 centre-backs in the Ekstraklasa, on 3 clean sheets and 2.147 defensive actions per 90.
Year-on-year, that's a clear step up on last season (Season 5 → 10). Over the 5 seasons on record his form has drifted down, peaking in 2022/23.
On long-term talent our Rating reads 31, top 37% of the 49 centre-backs in the Ekstraklasa. At 26 Kobayashi is in his prime years, and a market index of 4.5 reflects that trajectory.
Past his 2022/23 peak — the recent trend is downward, so buyers are paying for what's left, not what was.
2.15 tackles, blocks & interceptions per 90 — moderate defensive volume, with 3 clean sheets across 14 appearances. Behind an upper-table side (3rd of 18) the side controls more games, so the defensive load is lighter — the value sits as much in composure and ball progression as in raw volume. Going forward he chipped in 1 goal and 0 assists — a useful bonus from the back.
With a Rating of 31, Kobayashi carries the 18th-highest potential of the centre-backs in the Ekstraklasa of 49 — though on just 14 appearances this season, so the standing rests on a small sample. Defensively he reads as moderate defensive volume (2.15 tackles, blocks & interceptions per 90). In the prime window — at or near peak market value, so the next two seasons are the ones to cash in or build around.
Generated from Field Insider's rating model · AI-written analysis to follow.
The gold line is market value — an index (not €) blending rating, age and league. It climbs through the early 20s, peaks around ages 23–27 (~5), then tapers with age. At 26, Kobayashi sits on 4.5, at or near its peak. The blue line is Kobayashi's projected Rating — 31 today — recomputed at each age, so it follows the same rise-and-fall as a career matures and declines. Solid = up to today; dashed = projected.
No transfer news found for this player.
