ARIB STD-T71

ARIB STD-T71, Broadband Mobile Access Communication System (CSMA), specifies technical requirements for Japanese broadband wireless access and low-power data communication systems using IEEE 802.11-based CSMA/CA. Its scope includes applicable spurious-emission, channel-access and Dynamic Frequency Selection (DFS) requirements.

The current edition is Version 8.0, published on April 16, 2026. It reflects current Japanese radio regulations and supports technologies including IEEE 802.11ax and IEEE 802.11be (Wi-Fi 7).

Scope and Application

The standard covers radio equipment and associated control equipment operating in infrastructure mode and, on permitted channels, ad-hoc mode. Depending on the system and operating conditions, this includes:

• low-power wireless LAN and data communication systems;

• 5.2 GHz high-power data communication systems operated as registered stations;

• 5 GHz radio access applications; and

• 6 GHz WLAN operation from 5,925 to 6,425 MHz with channel bandwidths of up to 160 MHz.

Frequency Use and Technical Requirements

The applicable channels, power limits, radar-detection measures and operating restrictions depend on the frequency band, station category, installation and use case. They must therefore be determined from the current ARIB standard together with the applicable MIC regulations rather than from a single general limit.

In particular, Version 7.0 added 20 MHz channels from 5,710 to 5,730 MHz and introduced 6 GHz operation from 5,925 to 6,425 MHz. Version 8.0 subsequently updated the provisions for 5.2 GHz WLAN use in vehicles. Outdoor operation and high-power systems remain subject to their respective regulatory conditions.

Certification and Labelling

Equipment placed on the Japanese market must comply with the applicable MIC technical regulations and follow the appropriate certification route through a Registered Certification Body (RCB). Certified radio equipment carries the Giteki mark and its certification information.

For support with testing and approval, see our MIC certification services.

Japan market-access guidance
Our MIC requirements overview explains the relevant equipment categories, certification routes and marking requirements.