J3 League · Sunday, 18 October 2026 · 06:00. Final score 2–0 (half-time 1–0). Before kick-off we rated it 50% under 2.5 goals — the match finished with 2, so that call landed. 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 | 50% | 50% | Under |
| Over 3.5 goals | 29% | 71% | no pick |
| Both teams to score | 50% | 50% | no pick |
The result model puts Renofa Yamaguchi at 67%, the draw at 20% and Kochi United at 13%, from expected goals of 2.05 and 0.77.
| Market | Price | Implied | Our rating | Edge |
|---|---|---|---|---|
| Over 2.5 goals | 1.75 | 54% | 50% | -4% |
| Under 2.5 goals | 2.05 | 46% | 50% | +4% |
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: Renofa Yamaguchi 1.48, draw 4.10, Kochi United 5.00.
The league sets the starting point. J3 League has produced over 2.5 goals in 48% of its matches, and that is where a team with no record of its own would sit.
Each side's own record. Renofa Yamaguchi have 4 in 10 this season (1 of 4 at home), Kochi United 4 in 10 (1 of 4 away). Those records are pulled toward the league rate with the weight of about 24 matches — enough that two or three unusual games cannot swing a rating — giving 46% and 46%.
Last season still counts, briefly. With 10 and 10 games played this season, last season's rates are still blended in and fade out entirely by game 40 — the point at which our testing showed they stop adding accuracy. A single season is part luck, so each club's record is first pulled toward the league average by 34 games' weight. That moves the two figures to 45% and 48%.
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 47%.
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 54%, from expected goals of 2.05 for Renofa Yamaguchi and 0.77 for Kochi United. Folding in 30% of that view gives 49%.
Calibration. Tested against 97,729 past matches, our ratings below 55% have run consistently too pessimistic — a figure in the high 30s, for instance, has come in about four points higher. So ratings in that range are lifted part-way back, giving 50%.
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 |
|---|---|---|---|---|
| Renofa Yamaguchi | 10 | 40% | 20% | 30% |
| Kochi United | 10 | 40% | 30% | 30% |
More: Renofa Yamaguchi season stats · Kochi United season stats · J3 League table and form. Ratings are calibrated probabilities, not tips — a 60% call is expected to miss two times in five.