Kosei Suwama
based on the 2025 season · updated 18 Aug 2026
Profile
Season stats
Full career & schedule →Domestic-league season · Yokohama F. Marinos.
Performance data · by competition
| Competition | Apps | G | A | Min | Match |
|---|---|---|---|---|---|
 J1 League | 1 | 0 | 0 | 90 | 6.2 |
Scout report
★ Standout performer
All J1 League standouts →First senior season on record — and already on the pitch for 100% of Yokohama F. Marinos's available minutes, one of the top game-time debuts in the J1 League this season.
K. Suwama is a 23-year-old central defender at Yokohama F. Marinos, rated 48 overall by Field Insider's model, ranking 24th of 113 on scout potential in the J1 League. An emerging talent, he has been a rotation option this season (36.8% 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 Suwama.
Judged on this season alone, Suwama graded 20 — a workmanlike campaign that ranks 21st of 21 of the 21 centre-backs in the J1 League, on 3 clean sheets and 2 defensive actions per 90.
We hold a single season for Suwama, so there's no year-on-year comparison to draw yet — the read above is this campaign only.
On long-term talent our Rating reads 48, top 29% of the 21 centre-backs in the J1 League. At 23 Suwama is still climbing toward his ceiling, and a market index of 13.1 reflects that trajectory.
Output in context · Yokohama F. Marinos finished 9th of 20 · a mid-table side
2 tackles, blocks & interceptions per 90 — moderate defensive volume, with 3 clean sheets across 7 appearances.
Watch points
- Game time. Only 36.8% of available minutes — needs a settled run to prove the level.
Outlook
With a Rating of 48, Suwama carries the 6th-highest potential of the centre-backs in the J1 League of 21 — though on just 7 appearances this season, so the standing rests on a small sample. Defensively he reads as moderate defensive volume (2 tackles, blocks & interceptions per 90). Approaching peak years; value is still building (price multiplier 2×) with the best seasons likely ahead. With this floor already at 23, the ceiling gets tested by a step up in level — one to track.
Generated from Field Insider's rating model · AI-written analysis to follow.
Season statistics
Bars = where he ranks among centre-backs 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.
