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For a Japanese Android game, check the probability table and terms for the exact gacha banner and draw you plan to use. CESA’s guideline says paid gacha should disclose every obtainable item and its probability, but that is an industry guideline—not proof of a universal statutory rate-display rule for every game. A listed chance also does not, by itself, tell you whether a guarantee, pity counter, or exchange applies.
How to read a gacha probability table
Find the chance for the item, not just its rarity
Start with the table attached to the specific banner. Check that it matches the banner’s current dates and the draw type you are considering. A rate for a rarity tier is not necessarily the chance of getting one particular character or item within that tier. Look for the individual item’s probability and whether the desired item is featured.
Read guarantees and counters as separate rules
A probability describes a random draw; it does not automatically promise a result after a certain number of draws. Read the banner terms for any multi-draw conditions, guaranteed result, pity counter, exchange shop, or duplicate conversion. Check how many draws a guarantee requires and whether a counter is limited to that banner, resets, or carries over. Those conditions are game- and banner-specific, so do not infer them from the probability table or from an older screenshot.
What Japan’s gacha guidance does—and does not—say
The Computer Entertainment Supplier’s Association (CESA) says its paid-gacha guideline establishes disclosure of all obtainable items and their probabilities as a principle. That is an association guideline for covered games, not a statute in itself, and it does not establish that every game available in Japan is covered by it.
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Japan’s Consumer Affairs Agency (CAA) addresses a different question: whether a reward mechanic constitutes prohibited “card matching” under the Act against Unjustifiable Premiums and Misleading Representations. The agency’s analysis turns on how the mechanic works, not what a game calls it. If users receive different kinds of randomly awarded items and must assemble a specified combination to obtain another prize-like economic benefit, the mechanism may fall under that prohibition. The CAA says the analysis applies to online transactions too.
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Direct gacha items, set-completion rewards, and misleading claims
The CAA distinguishes an item that is the direct object of a paid gacha transaction from a separate prize offered in connection with a transaction. A directly purchased gacha item is generally not treated as an incidental prize; that distinction does not exempt every other purchase-linked benefit from prize rules. A separate reward for completing a specified set of different randomly obtained items can raise the card-matching issue when the reward is a prize.
Claims about an item or an offer can raise a separate concern. The CAA notes that representations making an item appear materially better than it is, or purchase terms materially more favorable than they are, may be problematic under the Act. Whether a particular live game’s mechanics or wording crosses a legal line depends on the actual offer and how it works.
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Google Play payment options in Japan as of October 7, 2026
Google Play’s general policy requires Play Billing for digital in-app purchases in apps distributed through Play, subject to listed exceptions and programs. Google’s billing-choice program became available in Japan on September 30, 2026. Participation is optional for developers; enrolled developers must offer users a choice between Google Play Billing and an alternative billing system or external web link, and meet the program requirements. Availability of the program does not mean a particular game offers an alternative.
Google’s separate external payments program stopped accepting new Japan enrollments on September 30, 2026 and is scheduled to be discontinued after March 31, 2027. Developers already enrolled that want to continue offering external web links to users in Japan need to move to billing choice by March 31, 2027. These are changing platform rules, so consult Google Play’s current policy if you are making a decision after those dates.
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When a purchase uses alternative billing, Google says the transaction is not managed by Google Play; the alternative provider is responsible for the purchase’s provision and support. Before paying, identify the seller shown in the purchase flow and check where to get support and how to raise a refund or unauthorized-payment dispute. An alternative payment route does not, on its own, establish that a purchase is cheaper or offers more or fewer protections.
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Before you spend: a banner and payment checklist
- Confirm the rate table is for the exact banner, date window, and draw type.
- Check whether the probability is for the individual item or only a broader rarity category.
- Read the banner’s separate guarantee, pity, exchange, and counter reset or carry-over terms.
- Check the full price and the currency needed for the draw in the game’s offer terms.
- Identify the payment seller and the support and dispute route before confirming a purchase.
- For a completion reward, distinguish the directly drawn item from an additional benefit unlocked by collecting a specified set.
If the displayed probability appears different from the actual one, keep a record of the banner, its terms, and the relevant purchase or draw details. The CAA’s official FAQ addresses complaints phrased as “the displayed gacha probability differed from the actual probability”; consult its official consumer information channels for guidance.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
