Domestic-league season · Jubilo Iwata.
| Competition | Apps | G | A | Min | Match |
|---|---|---|---|---|---|
 J2 League | 12 | 2 | 0 | 649 | — |
 J-League Cup | 2 | 0 | 0 | 54 | — |
Sumi's current-season form is up 0% on last season (Season 0→6), while his Rating climbed 41→48. That makes this his strongest season for form to date.
| Season | Club | Apps | G | A | Match | RTG | Season |
|---|---|---|---|---|---|---|---|
| 2025/26 | Jubilo Iwata · 5th | 12 | 2 | 0 | — | 48 | 6 |
| 2024/25 | Jubilo Iwata · 18th | 1 | 0 | 0 | 6.2 | 41 | 0 |
Domestic-league totals per season. RTG = Field Insider Rating (potential / ceiling); Season = age-blind form that year.
K. Sumi is a 23-year-old central midfielder at Jubilo Iwata, rated 47.9 overall by Field Insider's model, ranking 108th of 874 in the J3 League. An emerging talent, he has been a fringe squad member this season (18.5% of available minutes). Below: strengths, watch-points, market-value outlook and the latest transfer news on Sumi.
Judged on this season alone, Sumi graded 6 — a workmanlike campaign that ranks 169th of 241 of the 241 central midfielders in the J3 League, on 2 goals, 0 assists and 0 defensive actions per 90.
Year-on-year, that's a clear step up on last season (Season 0 → 6).
On long-term talent our Rating reads 48, top 11% of the 241 central midfielders in the J3 League. At 23 Sumi is still climbing toward his ceiling, and a market index of 36.4 reflects that trajectory.
0 tackles, blocks & interceptions per 90 — light defensive volume, with 2 clean sheets across 12 appearances. Behind an upper-table side (5th of 20) 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 2 goals and 0 assists — a useful bonus from the back.
With a Rating of 47.9, Sumi carries the 26th-highest potential of the central midfielders in the J3 League of 241 — though on just 12 appearances this season, so the standing rests on a small sample. Defensively he reads as light defensive volume (0 tackles, blocks & interceptions per 90). Approaching peak years; value is still building (price multiplier 2×) with the best seasons likely ahead.
Generated from Field Insider's rating model · AI-written analysis to follow.
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 (~36), then tapers with age. At 23, Sumi sits on 36.4, at or near its peak. The blue line is Sumi's projected Rating — 47.9 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.
No transfer news found for this player.
