【Japan eSIM】KDDI & SoftBank Networks ｜ Recommended for Traveling in Japan

• The QR code will be sent to your contact email within 10 minutes of payment. Must be used within 30 days.

• Please ensure your device supports eSIM before placing an order.

Japan eSIM Features and Coverage

• Wide coverage across Japan, including Okinawa – stay connected even outside city centers

• Connects to Japan’s two major carriers, KDDI and SoftBank, for reliable signal

• Flexible plans – choose the data package and duration that suit your needs

How to Choose Your Japan eSIM Plan: Days and Data Explained

• Validity Period: Starts upon scanning the QR code. The first day counts until 23:59 (UTC+8 Time Zone); after 00:00, the second day begins

• Data Only (no voice or SMS)

• Coverage Area: Entire Japan, including Okinawa

• Data Policy:

  • Daily data plans: After reaching the daily limit, speed reduces to 128 kbps

  • Total data plans: Connection stops when total data is used up

• Local Carriers: KDDI / SoftBank

• Hotspot / Tethering: Supported
  (Compatibility may vary; 1 eSIM per phone is recommended)

Japan eSIM Installation and Important Reminders

• Recommended to install on the departure day while connected to the internet
  (e.g., airport Wi-Fi or before your original SIM loses signal)

• Not compatible with iPads, tablets, customized devices, contract phones, carrier-locked phones, jailbroken or rooted devices

• Cannot activate without an internet connection

• QR code is valid for 30 days; avoid purchasing too early

• Follow the installation instructions included in your eSIM email

Japan eSIM Customer Support

• For support, contact Line@ Official Account: @peanutmo (10:00-17:00, UTC+8 Time Zone). WhatsApp: +886-921-963-203

How to Check If Your Phone Supports eSIM

1. Dial *#06#
   If an EID appears, your phone supports eSIM
   (Please also confirm your device is not carrier-locked)
2. Refer to the compatibility list below
   (For reference only; we recommend confirming with your device manufacturer)

Japan eSIM Installation Guide: From Compatibility Check to Landing

The full walkthrough is below. Following it end to end — scanning the QR code through to switching your data line after you land in Japan — takes about ten minutes. If a step is unclear, the full installation guide covers it in more detail.

Japan eSIM: Frequently Asked Questions

Does this Japan dual-network eSIM work on Android?

Yes, the KDDI／SoftBank dual-network eSIM installs on Android and iPhone. For Android we also recommend KDDI native: high-speed unlimited, working on Android and iPhone. SoftBank native is optimised for iPhone and is our recommendation for iPhone users.

What does dual network actually give me?

The profile supports both KDDI and SoftBank, and your phone automatically connects to whichever has the stronger signal where you are, with no manual switching.

Which areas does it cover?

All of Japan, including Okinawa. KDDI and SoftBank are both major Japanese carriers, and cities such as Tokyo and Osaka as well as sightseeing areas across the country are covered.

How much data do I need for a week in Japan?

We recommend a plan with comfortable headroom. Maps, navigation, translation, social media and messaging usually add up to more than expected, and having enough data makes travelling abroad more relaxed. Around 3GB a day suits most travellers; for total-data plans, allow at least 20GB for a week. If you stream video, upload lots of photos or share the connection, go straight for unlimited.

How are the days counted on this Japan eSIM?

Counting starts when you scan the QR code and activate. The first day runs until 23:59 (UTC+8 Time Zone) that same day, and the second day begins after 00:00. Activate after you arrive in Japan rather than before you leave, so you do not waste a day.

When should I install the eSIM?

Install on your departure day while your phone still has internet — airport Wi-Fi works, or your home network before you fly. An eSIM cannot be activated without a connection.

How long is the QR code valid?

The eSIM must be activated within 30 days of delivery or it expires, and that is the buyer’s responsibility. Ordering about a week before departure is ideal rather than months ahead.

Which devices are not supported?

iPads, tablets, customised devices, contract phones, carrier-locked phones, and jailbroken or rooted devices are not supported. Before ordering, dial *#06# — if an EID appears your handset supports eSIM. Also confirm the phone is not locked to a carrier.

How soon will I receive it after paying?

The QR code is sent automatically to your contact email within about 10 minutes of payment. If it does not arrive, check your spam folder or contact our LINE official account @peanutmo / WhatsApp +886-921-963-203 (10:00-17:00, UTC+8 Time Zone).

Further Reading

Other destinations: Japan SoftBankJapan KDDI Native UnlimitedKorea eSIMAll Japan plans