Compliance guides
Messaging Compliance in Japan
SMS, WhatsApp, voice and RCS rules for businesses messaging customers in Japan.
Overview
Japan's Act on Regulation of Transmission of Specified Electronic Mail requires prior opt-in consent for marketing email and SMS, and every message must show the sender's details and an opt-out method.
The Act on the Protection of Personal Information (APPI), supervised by the Personal Information Protection Commission, applies, including rules on transfers of data outside Japan.
Japanese is the search language; Google leads, and Yahoo! Japan (which uses Google's search results) remains widely used.
WhatsApp's popularity varies across Asia; where it is widely used, Meta's policies and the local data protection law both apply to business messaging.
Some Asian markets operate do-not-call registers for marketing calls and messages, so lists should be checked before voice campaigns.
Advertising Rules
Advertising follows the Act against Unjustifiable Premiums and Misleading Representations; since October 2023, undisclosed stealth marketing is treated as a misleading representation.
Guides by Channel
SMS in Japan
Japan's Act on Regulation of Transmission of Specified Electronic Mail requires prior opt-in consent for marketing email and SMS, and every message must show the sender's details and an opt-out method..
Read the guide →WhatsApp in Japan
LINE is the dominant messaging app in Japan, so WhatsApp campaigns usually suit international or inbound-business audiences; any WhatsApp marketing still needs opt-in under the Anti-Spam Act and Meta's policies..
Read the guide →Voice Call in Japan
Telephone sales are regulated by the Act on Specified Commercial Transactions: callers must state their name and purpose at the start and must not call again after a refusal..
Read the guide →RCS in Japan
RCS business messaging availability in Japan depends on operator and device support, so we confirm coverage before planning campaigns and keep SMS as a fallback; the same consent rules that apply to SMS apply to RCS..
Read the guide →Digital Habits and Channels in Japan
Japan has very high smartphone use, and LINE is the dominant messaging app, with LINE Official Accounts the standard way for brands to message customers. SMS is used mainly for authentication and reservations, and email newsletters remain more common for marketing than in many countries.
Credit cards, IC cards such as Suica and QR payments such as PayPay are common, and convenience store payment is popular for online orders. Japanese customers expect polite, precise and carefully proofread communication. New Year, Golden Week, Obon, the summer and winter bonus seasons and White Day are key commercial moments.
Japan is one of the world's largest economies, with car makers such as Toyota and Honda, electronics, machinery and a large domestic retail market, and an ageing population that is increasing demand for healthcare and home services. The consumption tax is 10%, with 8% on food. Japanese consumers expect polite, formal language and precise information, and many still use email and LINE more than SMS for marketing. The Act on Regulation of Transmission of Specified Electronic Mail requires opt-in consent and sender details for marketing messages.
Regulators, Registers and Practical Rules in Japan
Japan's Act on Specified Electronic Mail requires opt-in.
Japan's Act on Regulation of Transmission of Specified Electronic Mail requires opt-in consent for advertising email and SMS, with sender details and an opt-out in each message. LINE is the dominant messaging app, and the main operators are NTT docomo, KDDI (au), SoftBank and Rakuten Mobile.
General guidance, not legal advice. Check current rules with the regulator or a local adviser before launch.
Compliance in Japan: FAQs
Which messaging channels need registration in Japan?
It depends on the channel. Sender IDs for SMS often need registration with operators or the regulator, WhatsApp requires a verified business account and approved templates, and RCS needs brand verification. Each channel guide explains the details.
Does data protection law apply to messaging in Japan?
The Act on the Protection of Personal Information (APPI), supervised by the Personal Information Protection Commission, applies, including rules on transfers of data outside Japan.
Is this legal advice?
No. These guides are general information. For significant campaigns, take advice from a local lawyer.
Plan Compliant Campaigns in Japan
Tell us what you need and we will get back to you, usually within one working day.
- Free requirement discussion
- Clear written quotation, in USD on request
- No long lock-in for most services
Prefer to talk? Call +91 88274 09728 or message us on WhatsApp.