+81 90-1234-5678 is the same as 090-1234-5678. The leading 0 is replaced by +81 for international format.
Calls from overseas, contacts stored in international format, or scam SMS sent through foreign servers.
Replace +81 with 0. That's it.
+1 (USA), +44 (UK), +86 (China). Unknown international calls are likely spam - don't call back.
Was this article helpful?
Not necessarily, but they may be scam messages sent through overseas servers. Legitimate Japanese companies rarely send SMS with the +81 prefix. Be cautious of any +81 SMS containing links.
Since +81 is Japan, you won't be charged international rates. Convert +81 to 0 before calling back. Don't call back numbers with other country codes (+1, +44, etc.).
Replace the leading 0 with +81. For example, to call 090-1234-5678, dial +81-90-1234-5678. Long-press the 0 key on your smartphone to enter the '+' symbol.
How to use Japan's country code +81 correctly, number conversion rules for international calls, and tips for reducing call costs.
8 minNuisance Call SolutionsCharacteristics of international spam calls and one-ring scams, plus effective blocking methods by smartphone OS and carrier.
7 minPhone Number BasicsJust by looking at the first 2-4 digits of a phone number, you can tell if it's a mobile, landline, or special service. Learn to read number prefixes.
7 minScam PreventionJapan loses 44.1 billion yen annually to phone fraud. This article analyzes the structural factors - an aging society, cash-based economy, and trust in landlines - through international comparison.
8 minPrivacy ProtectionSharing your phone number with friends is normal, but you can't control how far it spreads. Learn the rules for sharing your number safely.
6 minPrivacy ProtectionGetting your first smartphone and receiving calls from unknown numbers can be scary. Learn the basics of what to do.
6 minReceived a call from an unknown number? Search the phone number to check caller information and reviews.
Search Phone Number