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Giga Japan roaming: Coverage, price, and how it works
Discover Giga Japan roaming coverage, plans, prices, and how to use it for seamless data access while travelling from Singapore to Japan.
If you’re a Giga user travelling from Singapore to Japan, you can stay connected using Giga’s international roaming options. Giga offers roaming coverage in Japan through its roaming-inclusive plans and optional roaming add-ons.
This guide explains everything you need to know about using Giga roaming in Japan, including coverage, roaming partners, pricing, how to activate it, and reliable alternatives like Holafly’s unlimited data eSIM.
Avoid excessive roaming fees
Don't get caught out by data roaming charges in Japan. Use local networks at local rates.
Does Giga roaming cover Japan?
Yes. Giga does support international roaming in Japan, allowing you to access data on local partner networks. All Giga plans include a limited amount of global roaming data, which works in Japan. Travellers who need more data can purchase gigaRoam APAC or gigaRoam Global add-ons.
Giga uses partner networks in Japan to provide connectivity, ensuring stable 4G/5G coverage in major cities such as Tokyo, Osaka, Kyoto, and Sapporo, as well as popular tourist areas.
Giga Japan roaming price and data plans
There are two flexible ways to stay connected in Japan: use the roaming data included in selected Giga plans or top up with a roaming add-on if you need more data.
Below is a clear breakdown of both options and how much roaming data you can expect, so you won’t have to purchase an emergency local Japan SIM card.
Roaming inclusive plans
These monthly plans include global roaming data that also works in Japan:
- 5G 400GB Plan: 6 GB global roaming / SGD $18.33
- 5G 500GB Plan: 10 GB global roaming / SGD $20.37
- 5G 1TB Plan: 12 GB global roaming / SGD $28.00
Roaming add-ons
If your plan does not include global roaming or if you need additional data for Japan, Giga offers two paid roaming options:
- gigaRoam APAC: 1 GB roaming in 14 APAC destinations / SGD $5 for 5 days
- gigaRoam Global: 1 GB roaming in 48 destinations / SGD $15 for 15 days
Note: Giga roaming supports data only. Voice calls and outgoing SMS are unavailable abroad, although incoming SMS still works. If you’re unfamiliar with data roaming, resources on how to avoid roaming charges or planning your usage with a data usage calculator can help to estimate how much data you’ll need during tour trip.
How to use Giga Japan roaming
Getting mobile internet Japan with Giga roaming is straightforward. Here’s a quick step-by-step guide for both iPhone and Android users:
- Purchase or confirm your roaming plan.
- Check if your current Giga plan includes roaming data that works in Japan.
- If not, buy a roaming add-on through the Giga app.
- Turn on data roaming.
- iPhone: Settings → Mobile Data → Data Roaming → On
- Android: Settings → Network & Internet → Mobile Network → Data Roaming → On
- Restart your device to allow network reconnection.
- Automatically connect to Giga’s partner network in Japan.
- Start using apps, maps, messages, and browsing as usual.
If you’re comparing options beyond Giga roaming, reviewing local solutions such as Japan SIM card purchases or eSIM-based services like Holafly’s Japan eSIM may help you decide which setup best suits your travel style.
Stay connected in Japan with Holafly’s unlimited data eSIM
If you prefer a simple alternative to roaming, the Holafly eSIM offers unlimited data in Japan with reliable coverage and easy installation. It’s a convenient option for travellers who want a stable connection without managing roaming limits.
Holafly’s Japan eSIM provides a stable local network, making it easy to navigate cities, use translation apps, and stay connected during your trip in Japan.
Key benefits of Holafly’s Japan eSIM:
- Unlimited high-speed data
- Coverage on top-tier local networks
- 24/7 customer support
- Flexible durations for short or long trips
Japan eSIM price starts from SGD $2.08/day. For travellers visiting multiple destinations, the global subscription Holafly Plans is another option that offers unlimited data across multiple countries with a single eSIM, ideal for frequent travellers who look for reliable connectivity beyond Japan.
Avoid hidden data costs
Get the full price upfront with a Holafly's Japan eSIM. Enjoy unlimited data at no extra cost.
Disclaimer: The data in this article is accurate as of Dec 16th 2025, and is subject to change.
Plans that may interest you
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.
