The ranking rule, written out in full
Each operator record goes through ten yes-or-no checks weighted to a total of ten. Here are the weights, the sort rules and what the score cannot see.
Written by Rowan Sayer/Last checked:
Compiler of the operator records, working from published terms and licence registers
No one on this site decides which casino goes first. A short scoring routine reads each operator record, adds points for the facts it finds and sorts the result. This page writes that routine out in plain English, weight by weight, so anyone can hold the front-page table of the best crypto casinos in Japan up against the rule that produced it.
The routine measures disclosure: how much an operator has published about itself in a form a stranger can check. Disclosure is narrower than quality. A famous brand can finish below a small one simply because less of its paperwork is public, or because we have not yet found the page where it is. The casino reviews set out, source by source, what was read for each brand.
We chose disclosure because it is the one property that can be assessed from outside, with no account opened and no money moved. Payout speed or the standard of a support desk could only enter the score as guesses, and a guess in a comparison table does more harm than an honest gap.
Ten checks and what each is worth
Every check has two possible answers, pass or fail, and a pass earns a fixed number of points. The ten weights add up to 10, which is also the most any brand can reach. The final figure is rounded to one decimal place.
Two checks carry 1.5 points rather than 1: whether the record holds a licence status that is not flagged as revoked, and whether the operator's terms describe identity verification at all. They got the extra half point because a reader is most exposed when either of those facts is missing.
| Check | Points | Passes when |
|---|---|---|
| Live licence status | 1.5 | The record carries a licence status, and nothing in it says revoked, withdrawn or cancelled. |
| Verification described | 1.5 | The terms contain some description of identity checks. |
| Authority named | 1.0 | A licensing authority is named. |
| Licence number | 1.0 | A licence number is published. |
| Register reference | 1.0 | There is a register link or identifier to look the licence up with. |
| Verification threshold | 1.0 | The verification wording comes with a stated amount. |
| Studio list | 1.0 | A list of game suppliers was published and read. |
| Coin list | 0.75 | A list of accepted coins was published and read. |
| Restricted-country list | 0.75 | A list of excluded territories was published and read. |
| Year founded | 0.5 | The operator states the year it was founded. |
Total: 10.0 points. Each answer is taken from the operator record. There is no editorial input, and no field can be set by hand.
Why the maximum never shrinks
A brand that publishes two facts is scored out of 10, exactly like a brand that publishes all ten. The tempting alternative divides by however many fields happen to be filled in. Under that version an operator could publish one correct fact and collect a perfect mark, which pays brands for saying as little as possible.
With the maximum held still, a low score is simply an accurate description. A brand on 2 out of 10 has not been judged a bad casino. It is a casino for which eight of the ten questions had no published answer, and the number reports exactly that.
On this site, a blank field is always a sign that the source was missing or unread, and never a way of saying the answer is nothing. Code that mixed the two up would hand out points for documents nobody opened, so the scoring treats an empty list as a failed check.
The one rule that overrides the points
Before any scores are compared, the sort splits the records into two groups. An operator whose licence status reads as revoked, withdrawn or cancelled goes into the lower group, and every operator in the upper group ranks above it, however the points fall.
In the current records that lower group holds one brand, Bets.io, whose licence the register returns as revoked. Its other fields may add up to a respectable total. That changes nothing here: no amount of published detail can lift a brand over an authority that has taken its licence away.
Within each group, higher scores come first, and brands on equal scores are listed alphabetically so the table does not reshuffle from one build to the next. Apart from that tie-break, the revoked-licence rule is the only step where something other than arithmetic sets a position.
Restricted lists: counted for the score, read only for the filter
The score asks whether an operator published a restricted-country list at all. Which countries the list names plays no part in any score. Publishing the list is treated like publishing a coin list: a sign that the operator is willing to put its rules in writing.
The contents are read in one place only, the data build that decides who appears on this site. A brand is included when its own list was read and Japan is not on it. Because every listed brand has passed that filter, every listed brand also passes this check, so in practice it adds the same 0.75 to each row and separates nobody.
The two jobs are kept apart on purpose. If the score read the contents of restricted lists, it would start rewarding or penalising brands for where they choose to trade, and this site ranks only what operators publish.
Blind spots
The score cannot see how quickly withdrawals arrive, how support answers, how disputes end, how generous a bonus is, or whether an operator keeps to its own clauses. Measuring any of that would mean playing with real money, and nothing on this site involved that.
Size and fame earn nothing either. There are no points for traffic, popularity or age. Stating a founding year earns half a point on its own, so a brand that opened in 2013 and one that opened in 2024 receive the same half point if both give the year.
Money sits outside the routine too. The operator record has no field for a commercial deal, so a payment has no way into the score. The site's paid partner, Vave, is not a row in the ranked table; on the front page it has its own block, labelled as a commercial placement.
Questions people ask
- Does first place mean the best casino?
It means the operator whose paperwork is the most complete. Whether it is the best place to play is a separate question, and the score makes no attempt to answer it.
- Why is the top score always 10?
A maximum that shrank with the evidence would favour operators who publish little. Holding it at 10 means a low score reads correctly: most of the questions went unanswered.
- Does the paid placement change the order?
No. Nothing commercial is stored in the operator record, so the score cannot see it. One thing to know, though: the ‘Open site’ buttons in the table, like every outbound button here, lead to that same paid offer rather than to the operator in the row. The terms page explains how.
For the whole register side by side, see the crypto casinos in Japan on the home page.