Regulatory Compliance News

Japan Updates Radio Regulations for High-Frequency and 5.2 GHz Airborne Systems

The Japanese Ministry of Internal Affairs and Communications (MIC) has introduced several key amendments to the Regulations for Enforcement of the Radio Act. A significant focus of these updates is the expansion of technical standards for high-frequency equipment, specifically targeting the 60 GHz and 160 GHz bands. These changes are designed to accommodate emerging technologies in high-speed data transmission and precision sensing while ensuring electromagnetic compatibility (EMC) with existing infrastructure.

In addition to the millimeter-wave updates, the MIC has officially revised the regulatory framework for 5.2 GHz high-power wireless communication systems to support aerial applications. Effective April 2025, these revisions allow for the operation of high-power mobile stations and base stations in the 5,150–5,250 MHz band for airborne use. This is a critical development for the drone industry, as it enables long-range, high-speed data links for uncrewed aircraft systems (UAS) that were previously restricted to ground-based or low-power indoor operations.

For manufacturers seeking "GITEKI" (Technical Standards Conformity) certification, it is important to note that equipment operating in these bands must now adhere to updated testing protocols, including new SAR (Specific Absorption Rate) and power density measurement methods for devices used close to the human body. Additionally, the MIC has moved to harmonize frequency bands for automotive applications, such as Tire Pressure Monitoring Systems (TPMS) and Remote Keyless Entry (RKE), expanding the available spectrum to 433.05–434.79 MHz to align with global standards.