Wales v Japan
Set a scoreline and see where it sits among the 5,000 simulated runs behind this fixture. Ratings as at 2026-10-18.
WalesJapanThe steppers skip 1, 2 and 4. Points come in fives, threes and twos with a conversion needing a try in front of it, so no match has ever finished on any of them.
8.6% of runs finished in this bin — Wales by 13 to 17.
48 points is around the 53rd percentile of the total — the middle run scored 47.
Those two figures are separate readings and are not multiplied together. The simulation draws the gap and the amount of scoring independently, so one bar of the histogram covers many scorelines and the payload holds nothing about which of them came up with which gap.
That is the model’s own average scoreline. Nothing here scores any of it. The model’s gap is an average over both winners and yours is one afternoon, so the two are different kinds of number rather than one being right. How the model works.
Why Wales are favoured
How the model arrives at the chance of Wales winning. It starts at an even 50%, and each line below adds to that or takes from it, in percentage points (pp): a bar to the right helps Wales, a bar to the left helps Japan.
Wales 1868, Japan 1846 — 22 points, favouring Wales
Wales are at home
Recent results, past meetings between the two sides, and days of rest. It has a limit, so it can nudge the rating but never overrule it.
- Ground
- Principality Stadium, Cardiff
- Elevation
- 9 m
- Kick-off
- 2026-11-07, 16:40 UTC
- Competition
- Nations Championship
17 meetings — Wales 15, Japan 2. Last 2025: Wales 24–23 Japan.
None of this reaches the model. Weather is not a feature, team selection is not a feature and the record is already inside both ratings, so the probability above does not move because any of it changed.
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