Japan’s Ministry of Internal Affairs and Communications (MIC) has notified a proposed partial amendment to the Ordinance for Enforcement of the Radio Act under WTO TBT Notification G/TBT/N/JPN/840.
The proposed amendment impacts technical requirements applicable to low-power radio systems, including devices used in Tire Pressure Monitoring Systems (TPMS) and Remote Keyless Entry (RKE) applications.
Key Proposed Technical Changes
According to the official notification:
The operating frequency band for TPMS and RKE devices is proposed to be expanded to 433.05–434.79 MHz.
Certain enclosure-related requirements currently applicable to these devices are proposed to be removed.
These changes would update the technical framework under Japan’s Radio Act once formally adopted.
Regulatory Timeline
The proposal follows the WTO transparency process and includes the following key milestones:
| Regulatory Milestone | Date |
|---|---|
| WTO TBT Notification Issued | Under G/TBT/N/JPN/840 |
| Public Comment Deadline | 14 April 2026 |
| Planned Adoption of Amendment | June 2026 |
Stakeholders may submit comments during the consultation period before the amendment is finalised.
Regulatory Context
The amendment has been circulated through the WTO Technical Barriers to Trade (TBT) system, allowing international stakeholders to review and provide feedback.
If adopted as planned, the amendment will revise the technical conditions governing TPMS and RKE devices operating within the specified frequency band in Japan.
To read the official documentation, access here:
With evolving requirements such as the proposed amendments under WTO Notification G/TBT/N/JPN/840, early compliance planning is essential.
At C-PRAV, we support manufacturers seeking compliance under Japan’s Radio Act and related technical regulations. Our team provides regulatory guidance and certification coordination for wireless and radio products, including devices operating in sub-GHz bands such as those used for TPMS and RKE applications. C-PRAV helps ensure your products remain aligned with Japan’s regulatory framework and ready for market entry.
Have questions? Feel free to contact us today!