Japanese SMS Meaning Checker
Received an SMS in Japanese and not sure what it says? Paste the text here to get a plain-language summary of what the message claims - missed delivery, unpaid fees, customs duty, frozen account and more - together with a scam-pattern check. Everything runs on your device.
Your text is processed entirely on your device and is never sent to any server.
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Message types this tool covers
The tool classifies Japanese scam SMS into the following common templates. Each "in reality" note is based on official statements from the relevant organizations, with sources.
Customs / import duty payment demand
The message claims to be a notice from Japan Customs: a parcel is being held at customs, or you must pay import duties or unpaid taxes, usually with a link to "resolve" it.
Japan's Customs and Tariff Bureau officially warns that it does not send SMS to the general public. Its official warning publishes real examples of scam SMS impersonating the bureau, including final seizure notices demanding payment of unpaid taxes.
Unpaid tax / asset seizure warning
The message claims to be from Japan's National Tax Agency or a tax office: you have unpaid taxes and face penalties such as asset seizure unless you pay immediately.
The National Tax Agency officially states that it never sends SMS containing URLs, and never uses SMS, email, or LINE to demand tax payment or announce seizures.
ETC card suspension / unpaid toll notice
The message claims your ETC card (Japan's electronic highway toll card) has been suspended or that you have unpaid tolls, and asks you to open a link to fix it.
The official ETC Usage Inquiry Service states it never sends billing emails and never asks for names, addresses, or credit-card details. "Unpaid ETC toll" messages are not official.
Missed parcel delivery notice
The message claims a courier tried to deliver a parcel but you were absent (or the address was incomplete), and asks you to open a link to arrange redelivery.
Yamato Transport and Sagawa Express officially state they never send delivery-absence notices by SMS, and Japan Post uses SMS only in limited cases. The "missed delivery" template is a classic scam SMS pattern in Japan.
Bank account / online account frozen
The message claims your bank account, credit card, or online account has been (or will be) frozen, locked, or suspended, and asks you to log in or verify your identity via a link to restore it.
"Account frozen" messages that push you to a login page are a classic phishing pattern. You can check each bank's or card issuer's official SMS senders and warnings in our verified sender database.
Verification code / PIN request
The message asks you to reply with or enter a verification code, one-time password, PIN, or card details, usually in the name of "identity verification" or "security".
Verification codes normally arrive only when you yourself initiate an action. Legitimate services do not ask you to hand over codes or PINs in response to a message.
Unpaid bill / payment confirmation
The message claims a mobile bill or service fee could not be confirmed or is unpaid, and asks you to open a link to update or confirm your payment details.
Real carriers such as docomo and au do send billing-related SMS, but they publish their official sender IDs, numbers, and link domains. Treat any payment demand you cannot match against those published lists as suspicious.
Prize / giveaway notification
The message claims you have won a prize, giveaway, or campaign reward, and asks you to open a link to claim it.
A "you won" message for a contest you never entered is a stock lure used to harvest personal or card information.
Frequently asked questions
Is this a translation tool?
Not a word-for-word one. It identifies which known template the message matches (missed delivery, unpaid fees, customs, frozen account, and more) and summarizes what the message claims. Because it is template-based, it cannot explain every possible text.
If no template matches, is the message safe?
No. It only means the text did not match a known template - that is no guarantee of safety. Do not open links in unexpected SMS; verify directly in the official app or website instead.
Is my text sent anywhere?
No. All checks run inside your browser on your device. The text, URLs, and phone numbers are never sent to a server.
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Disclaimer
Results from this tool are reference information and do not guarantee accuracy or completeness. The absence of detected patterns is not a guarantee of safety (this tool never displays a "safe" verdict). Always make the final confirmation through each service's official app or website.
Your text is processed entirely on your device and is never sent to any server.
Detection rules last updated: 2026-07-26