The Ministry of Internal Affairs and Communications has recently published a partial revision of the regulations for the enforcement of the radio law (Ordinance No. 59). The authority has successfully revised the regulation connected to currently operating WLAN frequency bands. and the 5.2 GHz (5150-5250 MHz) range for WLAN devices in vehicles. The main outcomes of the revision are as follows:
1. The authroity opens the 6GHz (5925-6425 MHz) frequency range for WLAN devices and, consequently, introduces the Wi-Fi 6E technology which is now available in Japan. Equipment can be used only indoors (200mW EIRP) as well as indoors and outdoors with a 25mW EIRP power level.
2. It is permitted to use the 5150-5250 MHz (5GHz) frequency range for WLAN devices instulled in vehicles (resp. cars). Output power is limited to 40mW EIRP.
More detailed information can be found under the following links:
MIC published amendment of the Radio Act Enforcement Regulations on 31 AUG 2021 for UWB and Millimeter-Wave Radar
The Japanese Ministry of Internal Affairs and Communications (MIC) have released an updated version of the Radio Act Enforcement Regulations, Radio Equipment Regulations and Technical Standards Conformity Certification of Specified Radio Equipment in order to extend the UWB wireless system frequency band to 7.25 – 9 GHz for outdoor use.
Further technical conditions to be met by the equipment are:
- occupied frequency bandwidth tolerance shall be 1.75 GHz
- housing must be designed so that it cannot be easily opened
- peak antenna power 0dBm per 50 MHz or less/ average antenna power -41.3 dBm/MHz or less
Technical requirements for millimeter-wave radars in 60 GHz band (57 GHz – 64 GHz)
MIC working on development of 920 MHz RFID regulation
Active low power wireless systems in the 920MHz band are widely used for mobile identification (RFID), smart meters, sensor networks, etc.
In recent years, narrowband communications (LPWA), which can transmit power over long distances, are becoming more widespread as sensor networks. In Japan. this system is equipped with a carrier sense function to share the frequency between the systems, while in other countries, frequency hopping and low duty cycle functions are in use. Therefore, the need for harmonization with other countries is increasing.
In light of these needs, the Ministry of Internal Affairs and Communications studied the necessary technical conditions for the introduction of a system that does not require a carrier sense function. Based on this report, the MIC decided in January to develop regulations for 920 MHz RFID.
To provide better WLAN connections Japan plans to amend its regulation. The changes are scheduled for summer 2018 and focuse on the 5 GHz frequency. Effectively it will provide better compatibility with other regions, further details can be found in the draft.
Updated Labelling Requirements for Radio Devices
Japan’s Ministry of Internal Affairs and Communications (MIC) recently revised its labeling regulations to accommodate smaller devices with size restrictions.
More simplified labelling is allowed as below:
Simplification of the Certification number - Under the prior scheme, the label code was comprised of the CAB code (first three digits), followed by reference to the category of the specified radio (WW) and a 10-digit certification number given by the CAB. Under the new scheme, the category of the specified radio (WW) is no longer required to be printed on the label and the certification number given by the CAB has dropped from 10 to 6 digits.
Use of electronic label - For devices with a screen, such as a phone, the label can be displayed on the screen instead of being printed on a physical label on the device.
These changes come in addition to another recent change which allows CABs to issue a single certification number to cover a product with multiple radios, where previously separate certification numbers would have been granted instead.
The Type A electrical plug (or flat blade attachment plug) is an ungrounded plug with two flat parallel pins. Although the American and Japanese plugs appear identical, the neutral pin on the American plug is wider than the live pin, whereas on the Japanese plug both pins are the same size. As a result, Japanese plugs can be used in the US but often not the other way around. The pins on Type A and Type B plugs have a hole near the tip that fits into ‘bumps’ found on the contact wipers of some sockets, so that the pins are gripped more tightly allowing for better contact and also to prevent the plug from slipping out of the socket. Some sockets have spring-action blades that grip the sides of the pins, making the holes obsolete.
The Type B electrical plug has two flat parallel pins and a round grounding (or earth) pin. The earth pin is longer than the other two so that the device is grounded before the power is connected. As with the type A plugs, the American and Japanese versions vary slightly. Type B plugs are rated at 15 amps.