Scope and Impact

This regulation, issued by the Ministry of Internal Affairs and Communications (MIC) of Japan, introduces a partial amendment to the Ordinance for Enforcement of the Radio Act. The primary focus of this amendment is to incorporate the 433 MHz band into the classification of "Specific low power radio stations." This change is intended to align Japan's domestic regulations with international standards for automotive safety and convenience systems, specifically impacting manufacturers of Tire Pressure Monitoring Systems (TPMS) and Remote Keyless Entry (RKE) systems.

Permitted Radio Bands and Technical Parameters

The amendment adds a specific frequency range to the existing regulatory framework for low power devices. The designated technical parameters are as follows:

Frequency Range: 433.795 MHz to 434.045 MHz.

Designated Uses: Tire Pressure Monitoring Systems (TPMS) and Remote Keyless Entry (RKE) systems.

Classification: Specific low power radio station.

Specific Restrictions

The use of the 433.795 MHz to 434.045 MHz band under this amendment is strictly limited to TPMS and RKE applications. The new Ordinance on Radio Equipment and associated Public Notices define the precise technical requirements to prevent interference and ensure compatible operation within these designated frequency limits.

Testing and Conformity Assessment Procedures

Devices operating within the newly added 433 MHz range must comply with the technical regulations specified in the Ordinance on Radio Equipment and Relevant Public Notices. As "Specific low power radio stations," these devices are generally subject to Japan's mandatory technical standards conformity certification (often referred to as "Giteki" certification). The basic legal framework for these procedures remains the Radio Act (1950 Law No. 131).

Regulatory Modifications

This regulation functions as a "Partial Amendment of Ordinance for Enforcement of the Radio Act etc." It modifies the existing enforcement ordinances of the Radio Act (1950 Law No. 131) to expand the frequency allocations available for specific low-power automotive applications. These changes are scheduled for adoption and entry into force in February 2025.