based on the 2026 season · updated 19 Oct 2026
Profile
Season stats
Full career & schedule →Domestic-league season · Fagiano Okayama.
Also this season
On loan at FC Tokyo — J-League Cup: 2 apps, 0g 0a, 141 min
The headline Season rating covers his time at Fagiano Okayama; availability counts only fixtures while in this squad.
Performance data · by competition
| Competition | Apps | G | A | Min | Match |
|---|---|---|---|---|---|
 J1 League | 1 | 0 | 0 | 100 | 7.2 |
Scout report
K. Shirai is a 32-year-old central midfielder at Fagiano Okayama, rated 20.6 overall by Field Insider's model, ranking 177th of 193 on scout potential in the J1 League. A seasoned veteran, he has been a rotation option this season (46.2% of available minutes). His defensive output reads 2.17 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 18 — a workmanlike campaign that ranks 23rd of 41 of the 41 central midfielders in the J1 League, on 1 goal, 0 assists and 2.165 defensive actions per 90.
Year-on-year, that's broadly in line with last season (Season 16 → 17). Over the 6 seasons on record his form has trended upward, peaking in 2023/24.
On long-term talent our Rating reads 21, 40th of 41 of the 41 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 3.2 reflects that trajectory.
Below his 2023/24 peak but holding a solid level — the platform for a return is there.
Output in context · Fagiano Okayama finished 11th of 20 · a mid-table side
2.17 tackles, blocks & interceptions per 90 — moderate defensive volume, with 2 clean sheets across 10 appearances. Going forward he chipped in 1 goal and 0 assists — a useful bonus from the back.
Watch points
- Game time. Only 46.2% 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 20.6, Shirai carries the 40th-highest potential of the central midfielders in the J1 League of 41 — though on just 10 appearances this season, so the standing rests on a small sample. Defensively he reads as moderate defensive volume (2.17 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.
Season statistics
Bars = where he ranks among central midfielders in the J1 League with 600+ minutes this season.
Shooting
Passing
Possession
Defending
Yellow/red cards
Transfer news
No transfer news found for this player.
