How to Activate a Japan eSIM on iPhone — Step-by-Step Guide 2026

TL;DR

Activating a Japan eSIM on iPhone takes less than 5 minutes. Go to Settings > Cellular > Add eSIM, scan the QR code from your PlanJapan confirmation email, and enable the line before your flight. Your iPhone must be carrier-unlocked and running iOS 12.1 or later. Every iPhone from the XS (2018) onward supports eSIM — including the iPhone 17, 17 Air, 17 Pro, 17 Pro Max and 17e released in September 2025.

How to Activate a Japan eSIM on iPhone — Step-by-Step Guide 2026

Which iPhone Models Support eSIM? The Complete List

eSIM support has been available on iPhone since the XS series (2018). All of these models are compatible:

  • iPhone XS / XS Max / XR
  • iPhone 11, 11 Pro, 11 Pro Max
  • iPhone SE (2nd generation, 2020)
  • iPhone 12, 12 mini, 12 Pro, 12 Pro Max
  • iPhone 13, 13 mini, 13 Pro, 13 Pro Max
  • iPhone SE (3rd generation, 2022)
  • iPhone 14, 14 Plus, 14 Pro, 14 Pro Max
  • iPhone 15, 15 Plus, 15 Pro, 15 Pro Max
  • iPhone 16, 16 Plus, 16 Pro, 16 Pro Max
  • iPhone 17, 17 Air, 17 Pro, 17 Pro Max (September 2025)
  • iPhone 17e (September 2025)

Note for US buyers: iPhone 14 and later purchased in the United States are eSIM-only (no physical SIM tray). Models bought in Europe or Canada have both a nano-SIM slot and an eSIM.

How to check your iPhone's eSIM compatibility: Go to Settings > General > About and scroll down. If you see an "EID" number, your iPhone supports eSIM.

What You Need Before Activating

  1. A carrier-unlocked iPhone — your device must accept SIM cards from any carrier. If you're still under contract with a carrier, contact them to request an unlock before your trip.
  2. A Wi-Fi connection — eSIM activation requires internet access. Do it at home or at the airport before boarding.
  3. Your PlanJapan QR code — sent by email after purchase. To scan it, display it on a different screen (a laptop or a printout), since your iPhone camera can't scan a QR code shown on its own screen.
  4. iOS 12.1 or later — check in Settings > General > Software Update.

How to Activate Your Japan eSIM on iPhone: Step-by-Step

Method 1 — QR Code (Recommended)

  1. Open Settings on your iPhone.
  2. Tap Cellular (or "Mobile Data" on some iOS versions).
  3. Tap Add eSIM.
  4. Select Use QR Code.
  5. Scan the QR code from your PlanJapan email — displayed on a computer or printed out.
  6. Tap Continue, then Add Cellular Plan.
  7. Label the plan (e.g., "Japan 2026") so you can identify it easily.
  8. Set your home carrier line as the default for calls and SMS. Use the Japan eSIM for mobile data only.
  9. Enable mobile data on the Japan line.

Method 2 — Manual Entry (If You Can't Scan the QR Code)

  1. Settings > Cellular > Add eSIM > Enter Details Manually.
  2. Enter the SM-DP+ Address and Activation Code from your PlanJapan email.
  3. Follow the on-screen steps to complete activation.

When to Activate: Before or During Your Trip?

Recommended approach: install the eSIM before departure, switch to the Japan data line when you land.

  • Installation requires Wi-Fi — do it at home or at the departure airport.
  • Most PlanJapan plans start counting from your first connection to a Japanese network (NTT Docomo, SoftBank, KDDI) — not from installation. Your data doesn't run during the flight.
  • Once installed, just disable airplane mode when you land at Narita, Haneda, or Kansai — your iPhone connects automatically within seconds.

APN Settings: Do You Need to Configure Anything?

No. PlanJapan eSIMs come pre-configured with the correct APN settings. Everything is set automatically when the eSIM profile installs — no manual input needed.

If data doesn't work after activation:

  1. Toggle mobile data off and on (Settings > Cellular).
  2. Make sure the Japan eSIM line is selected for mobile data.
  3. Enable Data Roaming if prompted (Settings > Cellular > [Japan Line] > Data Roaming).
  4. Restart your iPhone.

Frequently Asked Questions

My iPhone is carrier-locked — can I still use a Japan eSIM?

No. A carrier-locked iPhone only accepts SIM or eSIM from the carrier it's locked to. You need to unlock your device before your trip. Contact your carrier to request an unlock — it's typically free once your contract period ends.

Can I keep my home SIM active alongside the Japan eSIM?

Yes. From iPhone 13 onward, multiple eSIM profiles can be stored and switched between. The recommended setup: keep your home line active for calls and texts, use the Japan eSIM for mobile data. Your contacts can still reach you on your regular number throughout the trip.

Will the eSIM work as soon as I land in Japan?

Yes, as long as the eSIM was installed before the flight. When you land at Narita, Haneda, or Kansai, turn off airplane mode and your iPhone automatically connects to NTT Docomo or SoftBank. Data is usually available within one minute.

What if the QR code won't scan?

Your iPhone camera can't scan a QR code displayed on its own screen. Show the QR code on a laptop or print it out, then scan it with your iPhone. Alternatively, use manual activation with the SM-DP+ Address and Activation Code from your PlanJapan email.

Does the Japan eSIM work on the Shinkansen?

Yes. NTT Docomo and SoftBank cover the vast majority of Shinkansen routes (Tokaido, Sanyo, Tohoku, Hokuriku). Brief signal drops may occur in mountain tunnels or remote rural areas, but connectivity is reliable for most of the journey. For travel outside major cities, NTT Docomo has the best nationwide coverage.

Our Recommendation

For most travelers, the 50 GB eSIM plan is the sweet spot — enough for two weeks of heavy use: Google Maps all day, social media, real-time translation apps, video calls home.

If you want total peace of mind — or plan to share your connection via hotspot — the Unlimited plan is the zero-stress choice.

Browse Japan eSIM plans on esimjp.com
Unlimited eSIM Japan — no data limits

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