SeferESIM
SeferESIM offers prepaid travel eSIM data plans for compatible devices. Buy online without creating an account, receive installation instructions digitally, and choose a plan by destination, data allowance and validity. Customer support is available at support[at]seferesim.com.
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UnlimitedSeferESIM eSIM Data Plans for Japan
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SeferESIM for Japan FAQ
Does SeferESIM offer unlimited data eSIM for Japan?
SeferESIM does not provide a truly unlimited data eSIM for Japan. The plans that carry the “Unlimited” name actually give 1 GB per day and, once that amount is reached, the speed is reduced to 1000 kbps. Therefore the data is capped and not unlimited.
Travelers who need more data can choose from SeferESIM’s fixed data plans. For example, the Japan 50GB 30Days plan offers 50 GB of high‑speed 5G data for 30 days at $34.00 USD, and the Japan 20GB 30Days (IIJ) plan provides 20 GB for 30 days at $16.40 USD. These fixed plans give larger data allowances without the speed throttling that applies to the “Unlimited” plans.
Does SeferESIM offer Japan eSIM with phone number and SMS?
SeferESIM does not currently provide an eSIM for Japan that includes a phone number or SMS capability; only data‑only plans are offered for this destination. Travelers who need to make calls or send messages can use VoIP applications such as WhatsApp, Telegram, and iMessage over the data connection, although they should verify that these services are accessible in Japan before purchasing, because some destinations may block or restrict certain apps or VoIP services.
How many data plans does SeferESIM offer for Japan?
SeferESIM offers 79 single‑country data plans that cover Japan and 146 multi‑country plans that include Japan. The available plans range in price from $0.60 to $464.94 and vary in data cap from 100 MB up to 50 GB, with validity periods spanning 1 to 365 days. Some plans are fixed data‑cap concepts, where a set amount of data is allocated for the entire validity, while others are daily‑data‑cap plans that reset each day and allow a specific amount of data to be used per day. This breadth of options allows travelers to choose a plan that best matches their usage needs and budget.
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