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Japan: MIC revised regulations to add the 26GHz band for 5G mobile communications

Created：2026-05-25 Officially published at：2026-03-23 Effective Date：2026-03-23

Following the public consultation on introducing 26GHz for 5G networks on October 11, 2025, Japan's Ministry of Internal Affairs and Communications (MIC) issued Ordinance No. 26 on March 23, 2026, completing revisions to the Radio Act and technical standards for specific radio equipment. The main revisions are as follows:

  • Band expansion: Includes the 26GHz band and introduces new certification rules for the 22GHz, 26GHz, and 38GHz bands;
  • Technical requirements: New carrier aggregation-related requirements, and updated antenna output power and radiated stray power limits;
  • Transitional clause: Products that have completed certification under the old regulations and operate in the 27.0–29.5GHz band are exempt from recertification, with the exemption valid until May 31, 2031.

Click this link to view the original text of Ministry of Internal Affairs and Communications Decree No. 26.