Leo
Kokubo
GKJapan · Sint-Truidense VV
Player dossierPro League
LeoKokubo
GKGoalkeeperGoalkeeper
- Club
- Sint-Truidense VV
- League
- Pro League
- Nationality
- Japan
- Age
- 25
- Height
- 193 cm
- Foot
- Right
- Valued
- 4 Jun 2026
Pro LeagueReading the valuation
The market values Kokubo at €5M. Model A, which never saw Kokubo during training, estimates €6.2M: the market value is 20% below that estimate.
That is a factor of ×1.25. Model A's typical held-out miss is ×1.50 either way, so this gap is within its usual error.
Without league and club, Model B estimates €7.5M, further from the market. Model B is usually further off (typical miss ×2.07): league and club explain much of how the market prices players.
A gap describes the model's arithmetic for this player's inputs, not what the player is worth.
- Apps
- 65
- Minutes
- 5,850
- Started
- 65/65
- Min / app
- 90
- Cards
- 7Y 0R
Club matches, two years to the valuation date
The Valuation Journey
What moves Model A
Asking the prediction API to explain Model A for Kokubo…
SHAP describes the model's arithmetic for this player's inputs, not what causes market value. Model B can be explained only by the live service; Model A also has a published explanation for the research players.
Model A vs Model B against the observed €5M
Checking APIAsking the prediction API…
Held-out estimates come from cross-validation, with this player outside the training data: the honest comparison. Served models were refitted on every player, this one included, so they sit closer to the market. Shaded band: Model A's typical miss (×1.50 either way).
Player traitspercentiles vs 485 goalkeepers
Dashed ring: the goalkeeper median (50th percentile)
Minutes, last 365 days
Club minutes in the final year of the window: recent involvement, or the absence of it.
3,420 this player1,560 goalkeeper median90th percentile
No passing, progression or defensive actions exist in the dataset, so no trait claims to measure them.
Valuation history every Transfermarkt valuation on record
- First valuation
- €50k
- Jan 2019
- Peak
- €5M
- Mar 2026
- Model target
- €5M
- Jun 2026
- Valuations
- 15
- 3 club changes
Jun 2026: €5M, Sint-Truidense VV. Dotted lines mark the €2M, €10M and €30M tier boundaries.
Show as a table
| Date | Market value | Club |
|---|---|---|
| 2019-01-05 | €50k | Kashiwa Reysol U18 |
| 2020-11-02 | €100k | SL Benfica B |
| 2021-06-29 | €100k | SL Benfica B |
| 2022-04-01 | €125k | SL Benfica B |
| 2022-06-27 | €125k | SL Benfica B |
| 2022-12-28 | €125k | SL Benfica B |
| 2023-06-28 | €125k | SL Benfica B |
| 2023-12-14 | €750k | SL Benfica |
| 2024-06-06 | €750k | SL Benfica |
| 2024-10-02 | €1M | Sint-Truidense VV |
| 2024-12-11 | €2.5M | Sint-Truidense VV |
| 2025-06-12 | €3M | Sint-Truidense VV |
| 2025-12-10 | €4M | Sint-Truidense VV |
| 2026-03-13 | €5M | Sint-Truidense VV |
| 2026-06-04 | €5M | Sint-Truidense VV |
Audit context group-level, not about this player
- Audit group
- non-UEFA
- Population gap, Model A
- +0.093 95% CI +0.063 to +0.124
- This player, market vs held-out A
- −0.219
The group comes from first-listed citizenship and is never a model input. Across the population, non-UEFA players' market values sit about 10% above Model A's held-out estimates, relative to UEFA players in the same leagues. One player's residual says nothing about that pattern (typical miss ×1.50), and none of it is evidence of discrimination: the target may itself be biased. Open the Fairness Audit
In context observed value among comparable players in this build
All players in the Terminal →Pro League350 players · median €1.8M
Valued above 85% of the 350 Pro League players.
See them in the Explorer →Goalkeepers, all leagues485 players · median €1M
Valued above 79% of the 485 goalkeepers.
See them in the Explorer →Where Kokubo appears
Watchlists and the comparison tray are kept in this browser only.
Near this valuation closest observed values: same league, then same position
- VanakenAMClub Brugge KV · Pro League€5M
- HaspolatDMKVC Westerlo · Pro League€5M
- HadjAMUnion Saint-Gilloise · Pro League€5M
- SadickCBKRC Genk · Pro League€5M
- PopeGKNewcastle United · goalkeepers€5M
- ArrizabalagaGKArsenal FC · goalkeepers€5M
- WellenreutherGKFeyenoord Rotterdam · goalkeepers€5M
- BayındırGKManchester United · goalkeepers€5M
Counts and ranks of observed Transfermarkt values only; model errors are never ranked here. Full player export: Every player in the modelling population (D-011).