This website is not available to persons located in Japan. It is intended exclusively for Japanese-speaking adults accessing the website from jurisdictions where the relevant services are lawful.
A trusted online casino comparison and review site for Japanese-speaking players
There's a lot of noise out there when it comes to online casino info — especially in Japanese. We started Japan Bonus because we wanted to cut through the marketing fluff. We verify licences, withdrawal rules and Japanese support against the operator's published information and regulator registers, and only list casinos we can back with documented evidence.
Every review on Japan Bonus is published under the editorial team's collective byline — there are no invented experts here. Each page is the product of shared research, writing and fact-checking: licences are verified in regulator registers, and bonus terms and withdrawal rules come from the operator's own published documents. Facts we cannot confirm from a primary source are marked as unpublished or left out.
Here's what we do for every single casino review. No shortcuts.
We look up the license number in the regulator's official register to make sure it's real and active
We verify SSL is working properly and that privacy policies aren't full of red flags
Payout times, fees and limits come from the operator's published terms — where nothing is published, we say so
We check the operator's own published support languages, channels and hours
We read wagering requirements, expiry dates, game restrictions, and max cashout limits cover to cover
We put the documented facts together and rate overall value for Japanese-speaking players on a 5-point scale
We look up every casino's license on the regulator's actual website — MGA, Curacao, Gibraltar. No license? No listing. Simple as that.
Bonus rules, withdrawal conditions and the general T&Cs — cover to cover, to catch anything sneaky. When marketing contradicts the terms, we say so in the review.
Payout times, game counts and bonus terms come from the operator's own published documents. Where nothing is published, we say 'not published' instead of inventing a plausible number.
Reviews don't stop after publishing. We track license changes, bonus updates, and user feedback every day to make sure nothing goes stale.
We select casinos based on valid licensing, SSL encryption, Japanese-language coverage, clear withdrawal rules, and bonus term transparency. Each factor is checked against the operator's published information and regulator registers.
This site is funded by affiliate commissions, and partner brands may be featured prominently. However, the facts in our reviews — terms, licences, withdrawal rules — are never altered to favour a partner. See our affiliate disclosure for details.
Bonus information is automatically checked daily and updated immediately when changes are detected. Casino license status is verified monthly, and review content is revisited quarterly.
This site contains affiliate links to online casinos. If users register through these links, we may receive compensation. However, this does not affect the cost to users, nor does it influence the fairness of our reviews. Editorial policy and affiliate operations are completely separated.