Kosuke Shirai

Following his move to Fagiano Okayama, Shirai's current-season form is level with last season (Season 16→16), while his Rating held around 18. His peak season for form remains 2023/24 (Season 40).

Domestic career

Season	Club	Apps	G	A	Match	RTG	Season
2027/28	Fagiano Okayama · 9th	8	0	0	6.67	18	16
2026/27	Fagiano Okayama	17	2	3	7.12	—	—
2025/26	FC Tokyo · 11th	19	1	1	6.75	18	16
2024/25	FC Tokyo · 7th	23	1	2	6.8	28	15
2023/24	FC Tokyo	2	0	0	—	—	—
2023/24	Kyoto Sanga · 13th	34	0	2	6.84	37	40

Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year. 9 earlier seasons in the full career.

Scout report

Experienced headCentral midfielder

K. Shirai is a 32-year-old central midfielder at FC Tokyo, rated 18.4 overall by Field Insider's model, ranking 139th of 152 on scout potential in the J1 League. A seasoned veteran, he has been a rotation option this season (37.2% of available minutes). His defensive output reads 2.97 tackles, blocks and interceptions per 90. Below: strengths, watch-points, market-value outlook and the latest transfer news on Shirai.

Judged on this season alone, Shirai graded 16 — a workmanlike campaign that ranks 13th of 31 of the 31 central midfielders in the J1 League, on 1 goal, 1 assist and 2.974 defensive actions per 90.

Year-on-year, that's broadly in line with last season (Season 16 → 16). Over the 6 seasons on record his form has trended upward, peaking in 2023/24.

On long-term talent our Rating reads 18, 31st of 31 of the 31 central midfielders in the J1 League. At 32 Shirai is into the veteran stage, where the age curve weighs on the projection, and a market index of 3 reflects that trajectory.

From the career report

Read the full career report →

Below his 2023/24 peak but holding a solid level — the platform for a return is there.

Peak: 2023/24Holding levelBreakout: 2022/23Injury-hit 2025/264 clubs

Current potential31st of 31 central midfielders · J1 League Current season13th of 31 central midfielders · J1 League 13th-best central midfielder in the J1 League 139th in the J1 League · potential 31st-highest potential central midfielder in the J1 League

18.4

Ratingi

31st of 31 central midfielders

16.3

Seasoni

below regular-starter level

37.2%

Minutes

rotation minutes

2.97

Def. actions / 90

moderate defensive volume

Output in context · FC Tokyo finished 11th of 20 · a mid-table side

Apps

2.97

Def. / 90

Tackles

Interceptions

Clean sheets

2.97 tackles, blocks & interceptions per 90 — moderate defensive volume, with 4 clean sheets across 19 appearances. Going forward he chipped in 1 goal and 1 assist — a useful bonus from the back.

Watch points

Game time. Only 37.2% of available minutes — needs a settled run to prove the level.
Age curve. At 32, both level and resale value are on the downslope.
Level. Rates below a nailed-on top-tier starter on our model.

Outlook

With a Rating of 18.4, Shirai carries the 31st-highest potential of the central midfielders in the J1 League of 31. Defensively he reads as moderate defensive volume (2.97 tackles, blocks & interceptions per 90). Veteran phase — a short-term, lower-fee proposition as both level and value decline (0.8× and falling).

Generated from Field Insider's rating model · AI-written analysis to follow.

Per 90 & availability

Minutes played %37.2%

Available fixtures38 of 38

Goals / 900.071

Assists / 900.071

Goal contribution / 900.142

Defensive actions / 902.974

Player flow

Goal involvements2

Cards / 900

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 (~7), then tapers with age. At 32, Shirai sits on 3, past its peak and easing. The blue line is Shirai's projected Rating — 18.4 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 central midfielders in the J1 League with 600+ minutes this season.

Shooting

Goals1

Passing

Assists1

Defending

Tackles29

Interceptions10

Blocks3

Yellow/red cards

Yellow cards0

Red cards0

Transfer history

FC Tokyo(back from loan)Jun 2026 – now

Fagiano OkayamaJun 2026 – Jun 2026

Fagiano Okayama(on loan)Jan 2026 – Jun 2026

FC TokyoJul 2023 – Jan 2026

Kyoto SangaJan 2022 – Jul 2023Free

Kyoto Sanga(on loan)Feb 2021 – Jan 2022

Consadole SapporoJan 2018 – Feb 2021

Ehime FCJul 2015 – Jan 2018

Shonan Bellmareuntil Jul 2015

About K. Shirai

Kosuke Shirai is a 32-year-old central midfielder who plays for Fagiano Okayama, born on May 1, 1994 in Aichi, standing 166 cm tall. He is from Japan. Fagiano Okayama currently sit 9th of 20 in the J1 League.

This season

In the current season, K. Shirai has made 8 appearances with 0 goals and 0 assists across 622 minutes.

K. Shirai's next match is on October 10, 2026, when Fagiano Okayama face Avispa Fukuoka away in the J1 League.

Field Insider's view

Field Insider currently rates K. Shirai at 18.4 with a Season form score of 16.3, ranking 139th of 152 central midfielders in the J1 League. See the full scout report for strengths, watch-points and the market-value outlook.

His honours include 2 career titles — among them the J2 League. Full list in the career record.

Career

Across 14 recorded seasons, K. Shirai has totalled 317 club appearances with 13 goals and 10 assists for 6 different clubs. His busiest campaign came in 2017/18, with 41 appearances for Ehime FC.

K. Shirai's career has also included time at FC Tokyo, Kyoto Sanga, Consadole Sapporo, Ehime FC and Shonan Bellmare.

Transfer news

No transfer news found for this player.

Profile

Season stats

Also this season

Performance data · by competition

Career

Scout report

Output in context · FC Tokyo finished 11th of 20 · a mid-table side

Watch points