Yuki Kobayashi

Kobayashi's current-season form is down 30% on last season (Season 10→7), while his Rating held around 30. His peak season for form remains 2022/23 (Season 38).

Domestic career

Season	Club	Apps	G	Match	RTG	Season
2026/27	Jagiellonia · 13th	7	1	6.78	31	7
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

Squad depthCentral defender

Y. Kobayashi is a 26-year-old central defender at Jagiellonia, rated 30.1 overall by Field Insider's model. In his prime years, he has been a rotation option this season (35.3% of available minutes). His defensive output reads 2 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 7 for current form (age-blind), on 1 clean sheet and 2 defensive actions per 90.

Year-on-year, that's broadly in line with last season (Season 10 → 7). Over the 6 seasons on record his form has drifted down, peaking in 2022/23.

On long-term talent our Rating reads 30. At 26 Kobayashi is in his prime years, and a market index of 4.3 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

30.1

Ratingi

below regular-starter level

6.7

Seasoni

below regular-starter level

35.3%

Minutes

rotation minutes

Def. actions / 90

moderate defensive volume

Output in context · Jagiellonia finished 12th of 18 · a mid-table side

Apps

Def. / 90

Tackles

Interceptions

Clean sheets

2 tackles, blocks & interceptions per 90 — moderate defensive volume, with 1 clean sheet across 7 appearances. Going forward he chipped in 1 goal and 0 assists — a useful bonus from the back.

Strengths

Attacking threat. Chips in from deep: 0.17 goal involvements per 90, useful for a central defender.

Watch points

Game time. Only 35.3% 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 30.1 overall — below regular-starter level. Defensively he reads as moderate defensive volume (2 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 %35.3%

Available fixtures10 of 10

Goals / 900.167

Assists / 900

Goal contribution / 900.167

Defensive actions / 902

Player flow

Goal involvements1

Shot conversion %100

Shot accuracy %33.3

Pass accuracy %90

Cards / 900.167

Foul involvement / 901.167

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 (~4), then tapers with age. At 26, Kobayashi sits on 4.3, at or near its peak. The blue line is Kobayashi's projected Rating — 30.1 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

Shots on target1

Shots3

Passing

Assists0

Chances created2

Passes424

Pass accuracy90%

Possession

Duels won20

Duels won %57.1%

Fouls won3

Defending

Tackles6

Interceptions5

Blocks1

Fouls committed4

Yellow/red cards

Yellow cards1

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 13th of 18 in the Ekstraklasa.

This season

In the current season, Y. Kobayashi has made 7 appearances with 1 goal and 0 assists across 540 minutes, averaging a 6.71 match rating over his last 7 rated games, with 1 yellow card.

When Y. Kobayashi plays, Jagiellonia's record this season is 4W-0D-3L — and his match ratings average 6.71 at home against 6.7 on the road.

Recent matches

October 18, 2026: 0-1 loss away at Zaglebie Lubin (90 minutes, 7.1 rating)
October 15, 2026: 3-1 win at home vs Ararat-Armenia (90 minutes, 7 rating)
October 10, 2026: 1-3 loss at home vs Gornik Zabrze (90 minutes, 6.34 rating)
August 30, 2026: 5-2 win away at Raków Częstochowa (90 minutes, 6 rating)
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 October 28, 2026, when Jagiellonia face Lechia Gdansk away in the Cup.

Field Insider's view

Field Insider currently rates Y. Kobayashi at 30.1 with a Season form score of 6.7. 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 129 club appearances with 4 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.

Profile

Season stats

Performance data · by competition

Career

Scout report

Output in context · Jagiellonia finished 12th of 18 · a mid-table side

Strengths

Watch points