Japan's Ministry of Internal Affairs and Communications (MIC) has published a ministerial ordinance amending part of the Radio Equipment Regulations to advance the Inmarsat Type D system. The amendment introduces new technical requirements for satellite mobile earth stations, specifically allowing automatic selection of multiple transmission speeds, including 600, 1,800, 1,600, 3,200, 6,400, 12,800, and 25,600 bits per second. This update aligns Japanese regulations with international standards and supports innovation in satellite communications.

The ordinance was subject to a public consultation, which received two comments. One comment from Orbcomm Japan supported the initiative, while another anonymous submission called for immediate adoption of international standards and user-centric regulatory design. The MIC considered these opinions but did not revise the draft based on the feedback.

The regulation was promulgated and entered into force on June 30, 2026. Existing technical certifications and design approvals for affected equipment remain valid after the new ordinance takes effect, ensuring continuity for stakeholders. All related materials are available on the MIC website and at the Central and Satellite Mobile Communications Division.

This regulatory change impacts manufacturers, operators, and users of Inmarsat Type D satellite equipment, requiring adaptation to the updated technical requirements. The reform is expected to facilitate the adoption of advanced technologies, improve transmission efficiency, and promote sustainable development in Japan's telecommunications sector.

This regulatory change is classified as High Impact.

Key reasons for high impact:

• Mandatory technical requirements for Inmarsat Type D satellite mobile earth stations.
• Introduction of new transmission speed options, requiring product adaptation.
• Immediate effect upon publication, impacting certification and approval processes.
• Alignment with international standards, affecting importers and manufacturers.

Who is affected?

Manufacturers, importers, certification bodies, operators, and users of Inmarsat Type D satellite equipment and related radio devices.

Conclusion:

Stakeholders must review and update their products and compliance documentation to meet the new requirements, as the regulation is now in force and directly affects approval and operation of satellite communication devices.