In principle, it is a mandatory requirement to obtain a license for any radio station established or being used in Japan.

Qualification and the issuance of a license for a radio station is required to prevent radio interference or jamming and ensure the efficiency of radio usage.　The expectation to have every operator of a radio station carry such license would be inconvenient and unrealistic. Therefore, these “Specific Radio Equipment” are exempted from such license requirement. This exemption is granted under the condition that such equipment has met the requirements of Technical Regulation Conformity Certification under the Radio Law as indicated by bearing the “Technical Conformity Mark”.