---
title: "Japan (+81) Country Calling Code & SMS Numbering Plan"
---

Japan (+81) Country Calling Code & SMS Numbering Plan: SMSRiver

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- Japan (+81)

National Telecom Specification

# Japan (+81) Country Calling Code & SMS Guide

Complete engineering reference for phone numbering formats, domestic trunk prefixes, cellular mobile operator allocations, and regulatory A2P SMS requirements in Japan.

Quick Jump:
[Numbering Plan](#numbering-plan)
[A2P Regulations](#sms-regulations)
[Verify JP Number](#inspector-cta)

Country Dialing Code
+81
ISO: JP

Domestic Trunk Prefix
0
Omitted internationally

National Length
10 digits (mobile, excluding leading 0)
Local subscriber digits

Full E.164 Length
12 digits (+81 90 xxxx xxxx)
With +81 prefix

## Telephony Architecture & Carrier Allocations

Destination Codes:
Geographic 03/06, Mobile 070/080/090

Mobile Prefix Patterns:
070, 080, 090 prefixes allocated exclusively to mobile wireless networks by MIC

Major Mobile Network Operators:
NTT Docomo, KDDI (au), SoftBank, Rakuten Mobile

## A2P Messaging Regulations & Firewall Policies

A2P 10DLC & Campaign Registration
Not applicable. Regulated by the Ministry of Internal Affairs and Communications (MIC).

Alphanumeric Sender ID Support
Unsupported by major Japanese carriers. Sender displays as dedicated shortcode, carrier system number, or caller ID.

Two-Way Messaging Capability
Supported using Japanese 070/080/090 mobile numbers.

Character Encoding Standards
GSM-7 for standard Latin messages; UCS-2 (70 characters) for Japanese Kanji, Hiragana, and Katakana.

Compliance Framework: Act on Regulation of Transmission of Specified Electronic Mail (Anti-Spam Act); opt-in required, sender identity required.

Interactive Number Intelligence

### Test a Japan Number Now

Check if a Japan phone number conforms to the national numbering plan, classify mobile vs VoIP allocation, and obtain canonical E.164 standardization.

Inspect Number →

## Frequently Asked Questions for Japan

### What is the international country calling code for Japan?

Japan's international calling code is +81. Omit the leading 0 when dialing from abroad (e.g., 090 becomes +8190).

### Can I use Japanese characters in an SMS message?

Yes, but Japanese text (Kanji, Hiragana, Katakana) requires UCS-2 Unicode encoding, which limits a single billable SMS segment to 70 characters.

### Related National Calling Codes

[Australia
+61](/country-codes/australia/)

[Austria
+43](/country-codes/austria/)

[Belgium
+32](/country-codes/belgium/)

[Brazil
+55](/country-codes/brazil/)

[Canada
+1](/country-codes/canada/)

[France
+33](/country-codes/france/)

[Germany
+49](/country-codes/germany/)

[India
+91](/country-codes/india/)

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