Extract Japan Phone Numbers from Text
Paste any text containing Japan phone numbers and NumSwift identifies them instantly. Japanese mobile numbers are 11 digits locally starting with 0. The trunk prefix 0 is dropped for international dialing, leaving 10 digits after the country code. Mobile prefixes 070, 080, and 090 are used across all carriers. NumSwift recognises both local formats like 090-1234-5678 and international formats like +81 90-1234-5678, validating each number against Japan's numbering rules.
Last updated: 2026-03-18
Extract Phone Numbers Instantly
How to Use the Phone Number Extractor
Start by pasting text with phone numbers to see them appear here!
1. Copy Text
Copy text with phone numbers
2. Extract Numbers
Paste & extract
3. Use the Numbers
Call, SMS, or WhatsApp
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All processing happens in your browser. Your data never leaves your device and is not stored on our servers.
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💡 Pro Tips
- • Paste text from emails, documents, or websites
- • Works with international phone numbers from all countries
- • Click WhatsApp to message without saving contacts
- • Your extracted numbers are saved locally for quick access
How to Extract Japan Phone Numbers from Text
- Copy the text that contains Japan phone numbers (emails, spreadsheets, documents, or web pages)
- Paste it into the NumSwift text box above
- NumSwift scans the text and extracts all valid Japan (+81) numbers
- Each extracted number is validated against Japan's 10-digit format
- Use the extracted numbers to call, SMS, or WhatsApp directly from the results
Why Use NumSwift to Extract Japan Numbers?
- Detects Japan's 10-digit numbers in both local (090-1234-5678) and international (+81) formats
- Validates each number against Japan's numbering plan, catching mistyped or truncated numbers
- Recognises carrier-specific prefixes used by NTT Docomo, au (KDDI), SoftBank, Rakuten
- Processes hundreds of Japan numbers in a single paste with no server round-trip
Frequently Asked Questions
▶How many digits does a Japan phone number have?
Japanese mobile numbers are 11 digits locally starting with 0. The trunk prefix 0 is dropped for international dialing, leaving 10 digits after the country code. Mobile prefixes 070, 080, and 090 are used across all carriers. NumSwift accounts for all valid lengths when extracting numbers, so both mobile and landline formats are detected correctly.
▶Can NumSwift extract Japan numbers written in local format?
Yes. NumSwift recognises Japan numbers in local format (090-1234-5678), international format (+81 90-1234-5678), and various other common notations including with dots, dashes, or spaces as separators. The extraction engine is powered by Google's libphonenumber library, which supports all standard formats.
▶Does it work if the text mixes Japan numbers with numbers from other countries?
NumSwift handles mixed-country text seamlessly. It identifies each number's country of origin based on the prefix and formatting patterns, so Japan (+81) numbers are correctly distinguished from numbers belonging to other countries in the same text block.
▶Can I tell which Japan carrier a number belongs to from the extracted results?
The leading digits of a Japan mobile number often indicate the carrier — for example, NTT Docomo and au (KDDI) each have recognisable prefix ranges. NumSwift extracts and displays the full number, allowing you to identify the likely carrier from the prefix based on Japan's numbering allocations.