Yuki Kobayashi

Kobayashi's current-season form is level with last season (Season 10→10), while his Rating held around 31. His peak season for form remains 2022/23 (Season 38).

Domestic career

Season	Club	Apps	G	Match	RTG	Season
2026/27	Jagiellonia · 10th	3	0	6.83	31	10
2025/26	Jagiellonia · 3rd	14	1	6.91	31	10
2024/25	Portimonense · 15th	3	0	6.63	39	5
2022/23	Celtic · 1st	5	0	6.75	43	7
2022/23	Vissel Kobe · 13th	32	0	6.86	54	38
2021/22	Vissel Kobe · 3rd	22	0	6.9	52	25

Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year. 3 earlier seasons in the full career.

Japan · international

Side	Apps	G
Japan U20	4	0
Japan U17	3	0

Career caps & goals — tournament breakdown in the full career.

Scout report

★ Standout performer

All Ekstraklasa standouts →

One of the biggest game-time risers in the Ekstraklasa: on the pitch for 83% of Jagiellonia's available minutes this season, up from 34% last year — a bench-to-starter jump the ratings will catch up with at the next checkpoint.

Squad depthCentral defender

Y. Kobayashi is a 26-year-old central defender at Jagiellonia, rated 31 overall by Field Insider's model. 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.

On the season, Kobayashi graded 10 for current form (age-blind), on 3 clean sheets and 2.147 defensive actions per 90.

Year-on-year, that's broadly in line with last season (Season 10 → 10). Over the 6 seasons on record his form has drifted down, peaking in 2022/23.

On long-term talent our Rating reads 31. At 26 Kobayashi is in his prime years, and a market index of 4.5 reflects that trajectory.

From the career report

Read the full career report →

Past his 2022/23 peak — the recent trend is downward, so buyers are paying for what's left, not what was.

Peak: 2022/23Trending downStepped up 2025/264 clubs

Ratingi

below regular-starter level

9.9

Seasoni

below regular-starter level

34.2%

Minutes

limited game time

2.15

Def. actions / 90

moderate defensive volume

Output in context · Jagiellonia finished 3rd of 18 · an upper-table side

Apps

2.15

Def. / 90

Tackles

Interceptions

Clean sheets

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.

Watch points

Game time. Only 34.2% of available minutes — needs a settled run to prove the level.
Level. Rates below a nailed-on top-tier starter on our model.

Outlook

Rated 31 overall — below regular-starter level. 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.

Per 90 & availability

Minutes played %34.2%

Available fixtures34 of 34

Goals / 900.086

Assists / 900

Goal contribution / 900.086

Defensive actions / 902.147

Player flow

Goal involvements1

Cards / 900.429

Season-by-season progression

Rating (potential)Season (form)

Value & potential by age

Market valueRating

Solid = now · dashed = projected

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.

Season statistics

Bars = where he ranks among centre-backs in the Ekstraklasa with 600+ minutes this season.

Shooting

Goals1

Passing

Assists0

Defending

Tackles7

Interceptions7

Blocks11

Yellow/red cards

Yellow cards5

Red cards0

Transfer history

JagielloniaJul 2025 – now

PortimonenseAug 2024 – Jul 2025

CelticJan 2023 – Aug 2024

Vissel Kobe(back from loan)Feb 2021 – Jan 2023

Yokohama FC(on loan)Jan 2020 – Feb 2021

Machida Zelvia(on loan)Aug 2019 – Jan 2020

Vissel Kobeuntil Aug 2019

About Y. Kobayashi

Yuki Kobayashi is a 26-year-old centre-back who plays for Jagiellonia, born on July 18, 2000 in Kobe, standing 185 cm tall. He is from Japan. Jagiellonia currently sit 10th of 18 in the Ekstraklasa.

This season

In the current season, Y. Kobayashi has made 3 appearances with 0 goals and 0 assists across 225 minutes, averaging a 6.83 match rating over his last 3 rated games.

Recent matches

August 9, 2026: 0-2 loss at home vs Widzew Łódź (45 minutes, 6.3 rating)
July 31, 2026: 2-1 win away at Motor Lublin (90 minutes, 7 rating)
July 25, 2026: 1-0 win at home vs Korona Kielce (90 minutes, 7.2 rating)

Y. Kobayashi's next match is on August 30, 2026, when Jagiellonia face Raków Częstochowa away in the Ekstraklasa.

Field Insider's view

Field Insider currently rates Y. Kobayashi at 31 with a Season form score of 9.9. See the full scout report for strengths, watch-points and the market-value outlook.

His honours include 8 career titles — among them the Premiership and the Scottish Cup. Full list in the career record.

Career

Across 8 recorded seasons, Y. Kobayashi has totalled 125 club appearances with 3 goals and 0 assists for 6 different clubs. His busiest campaign came in 2022/23, with 32 appearances for Vissel Kobe.

Y. Kobayashi's career has also included time at Portimonense, Celtic, Vissel Kobe, Yokohama FC and Machida Zelvia.

On the international stage, Y. Kobayashi has represented Japan U20 and Japan U17 — 7 caps in our records.

Transfer news

No transfer news found for this player.