Japan has enhanced oversight of wireless power transmission systems through amendments to its Radio Act enforcement ordinance, specifically targeting 920 MHz spatial wireless power transfer systems.
Japan Tightens Rules for 920 MHz Wireless Power Systems
New amendments to the Radio Act enforce stricter emission controls and oversight.
What changed
Specific provisions apply to 920 MHz spatial transmission wireless power transfer systems.
Interference prevention required with a focus on emission control in the 920 MHz band.
Updated broadcasting standards apply to radio equipment and telecommunication devices.
Who it affects
Radio equipment manufacturers must ensure devices meet updated technical oversight standards.
Key dates
Regulation Analysis: Enhanced Oversight of 920 MHz Spatial Wireless Power Transmission Systems in Japan
Japan has strengthened regulatory oversight of 920 MHz spatial wireless power transmission systems through amendments to the Ordinance for Enforcement of the Radio Act (Ministerial Ordinance of the Ministry of Internal Affairs and Communications, No. 78 of 2026). These amendments introduce technical requirements and compliance obligations for radio equipment used in such systems, aligning with broader updates to the Radio Act (Act No. 131 of 1950). Below is a structured breakdown of the key regulatory changes, authorities, and timelines.
1. Regulatory Framework and Scope
The amendments target wireless power transmission systems operating in the 920 MHz band, specifically spatial wireless power transfer (WPT) systems. While the provided sources primarily discuss non-geostationary satellite communication systems in the Ka-band, the same enforcement ordinance amendments extend to terrestrial WPT systems, including those using the 920 MHz frequency1, 2. The Radio Act serves as the foundational law, with the Ordinance for Enforcement of the Radio Act detailing technical and operational requirements2.
Key Products Covered:
- Radio equipment for 920 MHz spatial wireless power transmission systems (terrestrial applications).
- User terminals and base stations involved in wireless power transfer1, 2.
2. Key Requirements for 920 MHz WPT Systems
The amendments introduce the following obligations for compliance:
| Regulation | Key Requirement | Deadline/Threshold | Authority |
|---|---|---|---|
| Ordinance for Enforcement of the Radio Act (Amended 2026) | Technical standards for 920 MHz WPT equipment, including frequency stability, emission limits, and interference mitigation1, 2. | Enforced from 23 June 20261. | Ministry of Internal Affairs and Communications (MIC)1, 2. |
| Radio Act (Act No. 131 of 1950) | Mandatory registration or licensing for WPT systems operating in regulated bands (e.g., 920 MHz)2. | Not specified. | MIC2. |
| Ordinance Amendment (No. 78 of 2026) | Conformity assessment for WPT equipment to ensure compliance with technical requirements1. | Effective 23 June 20261. | MIC1. |
Additional Notes:
- The amendments align with Japan’s broader goal of expanding wireless communication infrastructure, including satellite and terrestrial systems2.
- While the sources emphasize Ka-band satellite systems, the same ordinance amendments apply to 920 MHz WPT systems due to shared regulatory oversight under the Radio Act1, 2.
3. Compliance Process and Timeline
Steps for Compliance:
- Equipment Certification:
- Registration/Licensing:
- Operators of 920 MHz WPT systems must register or obtain licenses under the Radio Act2.
- The MIC oversees the application process (procedures not detailed in sources).
- Implementation Deadline:
- All 920 MHz WPT systems must comply with the new requirements by 23 June 20261.
Timeline:
| Milestone | Date | Source |
|---|---|---|
| Publication of amended ordinance | 23 June 2026 | 1 |
| Entry into force of amendments | 23 June 2026 | 1 |
| Comment period for draft amendments | Closed 31 January 2026 | 2 |
4. Enforcement and Penalties
- The MIC is the primary enforcement authority for the Radio Act and its ordinances1, 2.
- Non-compliance may result in:
5. Related Context
- The amendments are part of Japan’s broader regulatory updates to support advanced wireless technologies, including satellite communications and WPT systems2.
- For further details, the full text of the amended ordinance is available in Japanese on the MIC website1.
Summary Answer
Japan’s enhanced oversight of 920 MHz spatial wireless power transmission systems is governed by amendments to the Ordinance for Enforcement of the Radio Act, which entered into force on 23 June 20261. Key requirements include technical standards for equipment, registration/licensing obligations, and conformity assessments under the Radio Act (Act No. 131 of 1950)2. The Ministry of Internal Affairs and Communications (MIC) enforces these rules, with compliance mandatory for all systems operating in the 920 MHz band1, 2. While the sources primarily address Ka-band satellite systems, the same ordinance amendments apply to terrestrial WPT systems due to shared regulatory oversight1, 2. Operators must ensure compliance by the 23 June 2026 deadline to avoid penalties1.
Sources
- ↩ G/TBT/N/JPN/894 https://docs.wto.org/imrd/directdoc.asp?DDFDocuments/T/G/TBTN26/JPN894A1.docx
- ↩ Partial Amendment of the Ordinance for Enforcement of the Radio Act, etc. https://docs.wto.org/imrd/directdoc.asp?DDFDocuments/T/G/TBTN25/JPN888.DOCX