It's important to note that the products we offer do not support international roaming (i.e. our products can only function within Japan).
For details of the networks we use in Japan and the frequencies supported by our current product range, please refer to the relevant guide below -
Voice+Data SIM Cards
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The primary 4G frequency used by this network is:
4G Band 1 – 2100MHz
It’s vital that your device supports this frequency as this will provide network coverage in most major locations. We would therefore recommend using a device that supports this frequency at the very least.
However, this network also supports the following additional frequencies:
4G Band 3 – 1800MHz
4G Band 8 – 900MHz
The “4G Band 3 – 1800MHz” frequency is also commonly used in major areas (such as Tokyo, Nagoya and Osaka) and the “4G Band 8 – 900MHz” frequency can offer improved network coverage in mountainous regions / inside buildings etc.
For the best possible network coverage, we would recommend using a device that supports the primary frequency we first mentioned (the “4G Band 1 – 2100MHz” frequency) in addition to as many of the other frequencies shown above as possible.
Voice+Data eSIMs / Data-Only SIMs & eSIMs
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The Voice+Data eSIM products and the Data-Only SIM / eSIM products we offer all utilize the Docomo network.
The primary 3G/4G frequencies used within Japan by this network are as follows:
3G Band 1 – 2100MHz
4G Band 1 – 2100MHz
We would therefore recommend using a device that supports these 3G and 4G frequencies at minimum.
However, this network also supports the following additional frequencies:
3G Band 6 – 800MHz
3G Band 19 – 800MHz
4G Band 3 – 1800MHz
4G Band 19 – 800MHz
4G Band 21 – 1500MHz
The 3G Band 6 frequency and the 3G/4G Band 19 frequencies can offer improved network coverage in mountainous regions / inside buildings etc.
If your device supports the 4G Band 21 frequency (in addition to the 4G Band 3 frequency), you may also receive improved cellular data coverage in some cities.
For the best possible coverage, we would recommend using a device that supports the primary frequencies we first mentioned (the 3G and 4G Band 1 – 2100MHz frequency) in addition to as many of the other frequencies shown above as possible.
Voice Lite SIM Cards / eSIMs
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Our Voice Lite SIM Card / eSIM products utilize the Softbank network.
The primary 4G frequency used by this network is:
4G Band 1 – 2100MHz
It’s vital that your device supports this frequency as this will provide network coverage in most major locations. We would therefore recommend using a device that supports this frequency at the very least.
However, this network also supports the following additional frequencies:
4G Band 3 – 1800MHz
4G Band 8 – 900MHz
The “4G Band 3 – 1800MHz” frequency is also commonly used in major areas (such as Tokyo, Nagoya and Osaka) and the “4G Band 8 – 900MHz” frequency can offer improved network coverage in mountainous regions / inside buildings etc.
For the best possible network coverage, we would recommend using a device that supports the primary frequency we first mentioned (the “4G Band 1 – 2100MHz” frequency) in addition to as many of the other frequencies shown above as possible.
WiFi Devices
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The WiFi devices we offer support a range of frequencies and can connect to multiple networks in Japan.
These devices can connect to the Softbank network, the Docomo network, the AU network and the Rakuten network.
Please note that it will not be possible to select a specific network as these devices are configured to automatically connect to the best network that’s available at the time.
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