携帯電話の⽐吸収率（SAR）について / Specific Absorption Rate (SAR) of Mobile Phones
1. SO-04G の SAR / About SAR of SO-04G
（⽇本語）
この機種【SO-04G】の携帯電話機は、国が定めた電波の⼈体吸収に関する技術基準および電波防護の国際ガイドライ
ンに適合しています。
この携帯電話機は、国が定めた電波の⼈体吸収に関する技術基準(※1)ならびに、これと同等な国際ガイドラインが推奨
する電波防護の許容値を遵守するよう設計されています。この国際ガイドラインは世界保健機関（WHO）と協⼒関係にあ
る国際⾮電離放射線防護委員会（ICNIRP）が定めたものであり、その許容値は使⽤者の年齢や健康状況に関係なく⼗分な
安全率を含んでいます。
国の技術基準および国際ガイドラインは電波防護の許容値を⼈体に吸収される電波の平均エネルギー量を表す⽐吸収率
（SAR：Specific Absorption Rate）で定めており､携帯電話機に対する SAR の許容値は 2.0W/kg です。この携帯電話機
の側頭部における SAR の最⼤値は 0.80W/kg(※2)、⾝体に装着した場合の SAR の最⼤値は 1.05W/kg(※3)です。個々
の製品によって SAR に多少の差異が⽣じることもありますが、いずれも許容値を満⾜しています。
携帯電話機は、携帯電話基地局との通信に必要な最低限の送信電⼒になるよう設計されているため、実際に通話等を⾏
っている状態では、通常 SAR はより⼩さい値となります。⼀般的には、基地局からの距離が近いほど、携帯電話機の出⼒
は⼩さくなります。
この携帯電話機は、側頭部以外の位置でも使⽤可能です。キャリングケース等のアクセサリをご使⽤するなどして、⾝
体から 1.5 センチ以上離し 、かつその間に⾦属(部分)が含まれないようにしてください。このことにより、本携帯電話機
が国の技術基準および電波防護の国際ガイドラインに適合していることを確認しています。
世界保健機関は、
『携帯電話が潜在的な健康リスクをもたらすかどうかを評価するために、これまで 20 年以上にわたっ
て多数の研究が⾏われてきました。今⽇まで、携帯電話使⽤によって⽣じるとされる、いかなる健康影響も確⽴されてい
ません。』と表明しています。
さらに詳しい情報をお知りになりたい場合には世界保健機関のホームページをご参照ください。
http://www.who.int/docstore/peh-emf/publications/facts_press/fact_japanese.htm
SAR について、さらに詳しい情報をお知りになりたい⽅は、下記のホームページをご参照ください。
総務省のホームページ
http://www.tele.soumu.go.jp/j/sys/ele/index.htm
⼀般社団法⼈電波産業会のホームページ
http://www.arib-emf.org/01denpa/denpa02-02.html
ソニーモバイルコミュニケーションズ株式会社のホームページ
http://www.sonymobile.co.jp/product/SAR/
※1 技術基準については、電波法関連省令（無線設備規則第 14 条の 2）で規定されています。
※2 同時に使⽤可能な無線機能を持つ携帯電話機本体を側頭部でご使⽤になる場合の SAR 測定法については、平成 27
年 7 ⽉に、諮問第 118 号に関して情報通信審議会情報通信技術分科会より⼀部答申がなされており、これに基づいて評価
した場合においても SAR が許容値を満⾜していることを確認しています。
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※3
Xi/FOMA と同時に使⽤可能な無線機能を含みます。
(In English)
This model [SO-04G] mobile phone complies with Japanese technical regulations and international
guidelines regarding exposure to radio waves.
This mobile phone was designed in observance of Japanese technical regulations regarding exposure to radio
waves (*1) and limits to exposure to radio waves recommended by a set of equivalent international guidelines.
This set of international guidelines was set out by the International Commission on Non-Ionizing Radiation
Protection (ICNIRP), which is in collaboration with the World Health Organization (WHO), and the permissible
limits include a substantial safety margin designed to assure the safety of all persons, regardless of age and
health condition.
The technical regulations and international guidelines set out limits for radio waves as the Specific Absorption
Rate, or SAR, which is the value of absorbed energy in any 10 grams of tissue over a 6-minute period. The SAR
limit for mobile phones is 2.0 W/kg. The highest SAR value for this mobile phone when tested for use at the ear
is 0.80 W/kg (*2) and when worn on the body is 1.05 W/kg (*3). There may be slight differences between the
SAR levels for each product, but they all satisfy the limit.
The actual SAR of this mobile phone while operating can be well below that indicated above. This is due to
automatic changes to the power level of the device to ensure it only uses the minimum required to reach the
network. Therefore in general, the closer you are to a base station, the lower the power output of the device.
This mobile phone can be used in positions other than against your ear. Please keep the mobile phone farther
than 1.5 cm away from your body by using such as a carrying case or a wearable accessory without including any
metals. This mobile phone satisfies the technical regulations and international guidelines.
The World Health Organization has stated that "a large number of studies have been performed over the last two
decades to assess whether mobile phones pose a potential health risk. To date, no adverse health effects have
been established as being caused by mobile phone use."
Please refer to the WHO website if you would like more detailed information.
http://www.who.int/docstore/peh-emf/publications/facts_press/fact_english.htm
Please refer to the websites listed below if you would like more detailed information regarding SAR.
Ministry of Internal Affairs and Communications Website: http://www.tele.soumu.go.jp/e/sys/ele/index.htm
Association of Radio Industries and Businesses Website: http://www.arib-emf.org/01denpa/denpa02-02.html
(in Japanese only)
Sony Mobile Communications, Inc. Website: http://www.sonymobile.co.jp/product/SAR/ (in Japanese only)
*1 Technical regulations are defined by the Ministerial Ordinance Related to Radio Law (Article 14-2 of Radio
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Equipment Regulations).
*2 In regards to methods of measuring SAR when using mobile phones having multiple wireless devices to be
able to function simultaneously at the ear, in July of 2015, a portion of advisory 118 was reported on based upon
the Information and Communications Council. SAR value when evaluated based on the report is also under the
SAR limit.
*3 Including other radio systems that can be simultaneously used with Xi/FOMA.
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2. About SAR of SO-04G for FCC RF exposure requirements
Radio Wave Exposure and Specific Absorption Rate (SAR) Information
Important Information United States
THIS PHONE MODEL HAS BEEN CERTIFIED IN COMPLIANCE WITH THE GOVERNMENT'S REQUIREMENTS FOR
EXPOSURE TO RADIO WAVES.
The SO-04G Series mobile phones have been designed to comply with applicable safety requirements for
exposure to radio waves. Your wireless phone is a radio transmitter and receiver. It is designed to not exceed the
limits* of exposure to radio frequency (RF) energy set by governmental authorities. These limits establish
permitted levels of RF energy for the general population. The guidelines are based on standards that were
developed by international scientific organizations through periodic and thorough evaluation of scientific studies.
The standards include a safety margin designed to assure the safety of all individuals, regardless of age and
health.
The radio wave exposure guidelines employ a unit of measurement known as the Specific Absorption Rate (SAR).
Tests for SAR are conducted using standardized methods with the phone transmitting at its highest certified
power level in all used frequency bands.
While there may be differences between the SAR levels of various phone models, they are all designed to meet
the relevant guidelines for exposure to radio waves. For more information on SAR, please refer to the important
information chapter in the User Guide.
The highest SAR value as reported to the authorities for this phone model when tested for use by the ear is 0.70
W/kg*, and when worn on the body is 0.87 W/kg*. For body-worn operation, this phone has been tested and
meets the FCC RF exposure guidelines. Please use an accessory designated for this product or an accessory
which contains no metal and which positions the handset a minimum of 1.5 cm from the body.
For devices which include “WiFi hotspot” functionality, SAR measurements for the device operating in WiFi
hotspot mode were taken using a separation distance of 10 mm.
Use of third-party accessories may result in different SAR levels than those reported.
** Before a phone model is available for sale to the public in the US, it must be tested and certified by the Federal
Communications Commission (FCC) that it does not exceed the limit established by the government-adopted
requirement for safe exposure*. The tests are performed in positions and locations (i.e., by the ear and worn on
the body) as required by the FCC for each model. The FCC has granted an Equipment Authorization for this
phone model with all reported SAR levels evaluated as in compliance with the FCC RF exposure guidelines. While
there may be differences between the SAR levels of various phones, all mobile phones granted an FCC equipment
authorization meet the government requirement for safe exposure. SAR information on this phone model is on
file at the FCC and can be found under the Display Grant section of http://transition.fcc.gov/oet/ea/fccid/ after
searching on FCCID PY7-PM0816. Additional information on SAR can be found on the Mobile Manufacturers
Forum EMF website at http://www.emfexplained.info/.
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* In the United States, the SAR limit for mobile phones used by the public is 1.6 watts/kilogram (W/kg) averaged
over one gram of tissue. The standard incorporates a margin of safety to give additional protection for the public
and to account for any variations in measurements.
** This paragraph is only applicable to authorities and customers in the United States.
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3. About SAR of SO-04G for EU RF exposure requirements
Radio Wave Exposure and Specific Absorption Rate (SAR) Information
Europe
This mobile phone model SO-04G has been designed to comply with applicable safety requirements for exposure
to radio waves. These requirements are based on scientific guidelines that include safety margins designed to
assure the safety of all persons, regardless of age and health. The radio wave exposure guidelines employ a unit
of measurement known as the Specific Absorption Rate, or SAR.
Tests for SAR are conducted using standardized methods with the phone transmitting at its highest certified
power level in all used frequency bands. While there may be differences between the SAR levels of various phone
models, they are all designed to meet the relevant guidelines for exposure to radio waves.
For more information on SAR, please refer to the important information chapter in the User's Guide.
SAR data information for residents in countries that have adopted the SAR limit recommended by the
International Commission of Non-lonizing Radiation Protection (ICNIRP), which is 2 W/kg averaged over ten (10)
gram of tissue (for example European Union, Japan, Brazil and New Zealand):
For body worn operation, this phone has been tested and meets RF exposure guidelines when used with an
accessory that contains no metal and that positions the handset a minimum of 15 mm from the body. Use of
other accessories may not ensure compliance with RF exposure guidelines.
The highest SAR value for this model phone when tested by Sony for use at the ear is 1.10 W/kg (10g). In the
case where the phone is worn on the body, the highest tested SAR value is 1.01 W/kg (10g).
Declaration of Conformity for SO-04G
The Product "SO-04G" is declared to conform with the essential requirements of European Union Directive
1999/5/EC Radio and Telecommunications Terminal Equipment Directive 3.1(a), 3.1(b) and 3.2. The Declaration
of Conformity can be found on http://www.sonymobile.co.jp/product/SAR/doc /.
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