Japan's Ministry of Internal Affairs and Communications has notified the WTO of proposed amendments to the Radio Act enforcement ordinance that will expand frequency bands for Tire Pressure Monitoring Systems (TPMS) and Remote Keyless Entry (RKE) systems to 433.05-434.79 MHz. The changes eliminate equipment enclosure requirements and align Japan's technical requirements with global automotive radio equipment practices.
Japan's current Radio Act framework specifies narrower frequency bands for TPMS and RKE systems than those commonly adopted internationally. The proposed amendments reflect Japan's effort to harmonize its technical requirements with global practices for short-range automotive radio equipment. According to the WTO notification G/TBT/N/JPN/840, major countries do not impose enclosure-specific requirements on this category of equipment, creating regulatory divergence that affects international trade.
The Ministry of Internal Affairs and Communications circulated the WTO TBT notification on February 13, 2026, proposing partial amendments to the Ordinance for Enforcement of the Radio Act. The notification indicates that manufacturers worldwide have adopted a wider frequency band for TPMS and RKE applications, prompting Japan to align its framework with international practices.
The Land Radio Communications Committee reviewed these technical conditions under Inquiry No. 2009 concerning low-power radio systems. During its 97th meeting held on January 22, 2026, the Committee compiled the draft report supporting the proposed changes.
Further analysis of the enforcement mechanism reveals that competent authorities across multiple member states are expected to adopt a phased approach, with initial focus on high-risk product categories before extending surveillance to broader market segments. The transition period, while
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