J2 League · Saturday, 15 August 2026 · 11:00. Final score 1–0 (half-time 0–0). Before kick-off we rated it 50% over 2.5 goals — the match finished with 1, so that call missed. That rating was frozen into a version-controlled ledger before the game and has not been touched since.
Open this match in the app →| Market | Yes | No | Our call |
|---|---|---|---|
| Over 2.5 goals | 51% | 49% | Over |
| Over 3.5 goals | 27% | 73% | no pick |
| Both teams to score | 53% | 47% | Yes |
The result model puts Shonan Bellmare at 47%, the draw at 27% and Montedio Yamagata at 27%, from expected goals of 1.43 and 1.02.
| Market | Price | Implied | Our rating | Edge |
|---|---|---|---|---|
| Over 2.5 goals | 2.08 | 45% | 51% | +6% |
| Under 2.5 goals | 1.73 | 55% | 49% | -6% |
| Both teams to score | 1.83 | 50% | 53% | +3% |
Implied percentages have the bookmaker's margin removed, so they add to 100 and can be compared with our rating directly. Edge is simply the gap between the two. A positive edge means our model thinks the outcome is likelier than the price suggests — it is not a tip, and a high probability with a negative edge is a poor bet however safe it looks. Prices are a pre-match snapshot from a single bookmaker and move constantly.
Match odds: Shonan Bellmare 2.00, draw 3.25, Montedio Yamagata 3.70.
The league sets the starting point. J2 League has produced over 2.5 goals in 45% of its matches, and that is where a team with no record of its own would sit.
Each side's own record. Shonan Bellmare have 0 in 1 this season, Montedio Yamagata 0 in 1. Those records are pulled toward the league rate with the weight of about 32 matches — enough that two or three unusual games cannot swing a rating — giving 43% and 43%.
Last season still counts, briefly. With 1 and 1 games played this season, last season's rates are still blended in and fade out entirely by game 14 — the point at which our testing showed they stop adding accuracy. That moves the two figures to 47% and 67%.
The mix. Weighted 40% home side, 40% away side and 20% league — the split that beat every alternative across 30,582 matches of testing — that gives 54%.
Goal expectation. Separately a Poisson model built from attack and defence strength — using real expected-goals data where the league has it — puts this match at 44%, from expected goals of 1.43 for Shonan Bellmare and 1.02 for Montedio Yamagata. Folding in 30% of that view gives 51%.
This breakdown is generated from the same inputs the rating uses, so it cannot describe a calculation we did not perform. The full model is set out in the methodology.
| Team | Games | O2.5 | O3.5 | BTTS |
|---|---|---|---|---|
| Shonan Bellmare | 1 | 0% | 0% | 0% |
| Montedio Yamagata | 1 | 0% | 0% | 0% |
More: Montedio Yamagata season stats · J2 League table and form. Ratings are calibrated probabilities, not tips — a 60% call is expected to miss two times in five.