GOMO Japan roaming: Price and activation

Staying connected in Japan with your GOMO SIM is possible thanks to GOMO’s roaming support in the country. Whether you’re visiting for a short city break or a longer adventure, it’s important to understand how GOMO roaming works, what it costs, and how to activate it correctly.

In this guide, we’ll break down everything you need to know about GOMO Japan roaming, including eligible plans, add-on pricing, activation steps, and what to expect in terms of coverage.

You’ll also discover a contract-free GOMO alternative with Holafly Japan eSIM, ideal for travellers who want instant setup and stress-free connectivity.

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Don't get caught out by data roaming charges in Japan. Use local networks at local rates.

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Does GOMO offer roaming in Japan?

Yes, GOMO roaming is available in Japan. Powered by Singtel, the service operates via leading Japanese mobile networks, namely KDDI Corporation, NTT DOCOMO, and SoftBank Corp.

To use data roaming in Japan, you’ll need to ensure your GOMO plan is active and roaming is enabled before departure. Activation, usage, and pricing vary depending on your plan type and whether you choose to add a roaming pack.

Note: Not all GOMO plans include roaming by default. The best way to confirm your access is through the GOMO Singapore app.

GOMO Japan roaming price and data plans

If you’re heading to Japan with GOMO, you have two ways to stay connected: You can either rely on free roaming data included in your existing plan (if Japan is covered) or buy a roaming add-on designed specifically for Japan.

Which option works best depends on how much data you’ll need and what your current GOMO plan includes. If you’re not sure, don’t worry, we’ll walk you through both options below so you can choose the one that fits your trip.

Roaming-inclusive plans

If you’re on one of GOMO’s 5G+ no-contract plans, you already have monthly roaming data in Japan included in your plan. 

These higher-tier plans cost more than basic 4G ones but include bundled roaming, so you don’t need to purchase an add-on.

Here’s a breakdown of GOMO’s current 5G+ roaming-inclusive plans:

*All plans are no-contract and include free local calls/SMS.
* For plans with “unlimited” roaming, GOMO enforces a Fair Usage Policy with speed reductions after the cap.

Roaming add-ons

If your GOMO plan doesn’t include roaming in Japan, you can buy a Roam More Destination (RMD) add-on. 

These short-term passes are valid across Asia or worldwide, and include Japan. Plans differ by data size, duration, and price:

* Unlimited plans are subject to GOMO’s Fair Usage Policy (typically 20–25GB at full speed).

* Add-ons can be activated instantly through the GOMO app under “Roam More.”

These add-ons are ideal if you’re travelling to Japan occasionally and want control over costs; just pick the amount of data and coverage that suits your trip.

How to activate GOMO Japan roaming

Activating roaming with GOMO ensures a seamless internet connection in Japan the moment you land. Whether you’re using a roaming-inclusive plan or buying an add-on, setup is quick and can be done entirely from your phone.

Follow these steps to activate GOMO Japan roaming:

• Check if Japan is covered in your plan: Open the GOMO app and check your plan’s roaming entitlements. If Japan is not included, proceed to buy a roaming add-on.
• Buy a roaming add-on (if needed): Go to the “Roam More” section in the GOMO app. Choose either Roam Asia or Roam Worldwide depending on your needs, and select the data size and validity that suits your trip.
• Enable Data Roaming on your phone:
  • On iPhone: Settings → Mobile Data → Mobile Data Options → Toggle Data Roaming ON
  • On Android: Settings → Network & Internet → Mobile Network → Enable Data Roaming
• Set up APN to ‘sunsurf’ (if not auto-configured): Most devices will auto-detect settings, but if needed, go to your APN settings and enter sunsurf as the Access Point Name.
• Restart your phone after landing in Japan: This helps your device connect to GOMO’s partner networks in Japan (e.g., KDDI, NTT DOCOMO, SoftBank).

Enjoy fast and unlimited data in Japan with Holafly eSIM

While GOMO does support roaming in Japan, it comes with limitations such as capped data, potential speed throttling, and the need to manage roaming add-ons manually.

For a smoother experience, consider Holafly’s daily Japan eSIM plan at SGD $8 per day, and the Monthly eSIM Plans starting at USD $49.90.

Both eSIM plans include:

• Unlimited data at 5G speeds
• Coverage across Indonesia and 170+ global destinations
• 24/7 multilingual customer support
• Hotspot sharing and tethering
• Instant activation via QR code with no SIM swap needed

From weekend getaways to remote work abroad, Holafly’s unlimited Tokyo eSIM or Osaka eSIM keeps you connected wherever your journey takes you.

Avoid hidden data costs

Get the full price upfront with a Holafly eSIM for Japan. Enjoy unlimited data at no extra cost.

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Disclaimer: The data in this article is accurate as of November 11th, 2025, and is subject to change.

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Violet Lee

SEO Content Specialist

Formerly a travel journalist turned marketing copywriter, I found my way back to the travel world with Holafly—my dream company that made remote work possible. My motto? “Dream big and make it happen.” I’m passionate about writing, exploring the world, and staying active through walking, running, swimming, and hiking. I also love learning, reflecting, and connecting with inspiring minds.

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