Compliance Information on Radio Radiation Protection from Mobile Handsets

Radio waves emitted from smartphones and mobile phones/handsets are required to meet the limits of the local Specific Absorption Rate (SAR)*1 and Incident Power Density (IPD)*2, and/or Absorbed Power Density (APD)*3, or Total Exposure Ratio (TER)*4, which were stipulated in the Radio Law*5, when handsets are used close to the human body*6. We are providing this information in order to

• Help our customers better understand the intent of the law
• Assure our customers of the safety of our smartphone and mobile handsets

the local SAR and other values for all models are published on our website.

*1 Specific Absorption Rate (SAR)
This value is calculated by averaging the energy absorbed in 10 g of any human tissue over any 6-minute period when exposed to an electromagnetic field. It is applied for frequency bands up to 6 GHz. The limit is 2 W/kg (4 W/kg for whole body).

*2 Incident Power Density (IPD)
This value is calculated by averaging the energy that passes through 4 square centimeters of any body surface over any 6-minute period. The limit is 2 mW/cm2.

*3 Absorbed Power Density (APD)
This value is calculated by averaging the power absorbed within the human body as it passes through 4 square centimeters of any body surface over any 6-minute period. It is applied for frequencies over 6 GHz and up to 10 GHz. The limit is 2 mW/cm2.

*4 Total Exposure Ratio (TER)
This assessment value is applied when the frequency bands of radio waves emitted simultaneously are 6 GHz or below and above 6 GHz and when there is a mixture of local SAR and IPD. The limit is 1.

*5 Related laws
Article 14-2 of the Ordinance for Regulating Radio Equipment (Limits of Human Exposure to Radio Waves)
Ordinance on Technical Regulations Conformity Certification, etc. of Specified Radio Equipment (Appendix Table 1-1 (3))
Ministry of Internal Affairs and Communications Public Notice No. 324 of 2013 (Establishing the method to measure the SAR in the human body [except for both hands])
Ministry of Internal Affairs and Communications Public Notice No. 33 of 2019 (Establishing the method to measure the IPD in the human body [except for both hands])
Ministry of Internal Affairs and Communications Public Notice No. 54 of 2025 (Establishing the method to measure the APD in the human body [except for both hands])

*6 When used close to the human body
This is based on the assumptions that a handset is held against the side of the head for phone calls and that it is also used close to other parts of the body.