On June 23, 2026, Japan's Ministry of Internal Affairs and Communications (MIC) enacted Ministerial Ordinance No. 78, amending the Ordinance for Enforcement of the Radio Act and related Radio Equipment Regulations. This update introduces new technical requirements for wireless power transfer (WPT) systems operating in the 920 MHz band, specifically authorizing their use in outdoor environments under defined technical conditions. The amendment sets parameters for transmission power, emission control, interference protection, and coexistence with other services in the same frequency band.

Additionally, the regulation revises requirements for specified low-power radio stations and other radio equipment subject to technical certification, updating conformity assessment and approval criteria. These changes aim to facilitate the adoption of industrial and IoT applications based on wireless power transfer, while maintaining the integrity of the radio spectrum and protecting existing radiocommunication services.

Manufacturers, importers, testing laboratories, and certification bodies are directly impacted, as they must adapt their design, testing, and certification procedures to comply with the new technical requirements. The reform strengthens Japan's regulatory framework for emerging wireless technologies, promoting innovation and efficient spectrum use, while ensuring high standards of electromagnetic compatibility and interference protection.

Overall, the amendment is expected to drive the deployment of wireless power solutions and industrial IoT devices, requiring stakeholders to review and update their compliance processes for continued market access.

This regulatory update is classified as High Impact. Key reasons for high impact:

• Mandatory new technical requirements for wireless power transfer systems in the 920 MHz band.
• Authorization for outdoor deployment of WPT systems under specific conditions.
• Updated certification and conformity assessment criteria for low-power radio stations and radio equipment.
• Direct effect on manufacturers, importers, testing laboratories, and certification bodies.

Who is affected?

Manufacturers of wireless power transfer systems, industrial IoT device makers, importers, distributors, testing laboratories, certification bodies, and integrators of industrial solutions.

Conclusion:

The amendment requires immediate action from stakeholders to adapt design, testing, and certification processes, ensuring compliance with the new technical standards for continued access to the Japanese market.