5 GB
Data
30 days
Validity
$5.99
$1.20/GB
RoamVault eSIM Japan 2026: Promo Code, Data Plans & Prices
RoamVault eSIM Japan 2026: promo code, plans and prices. How much does it cost? Rates by days and GB, from the cheapest to the largest data package.
Traveling to more than one country? Add it to the search.
Updated Nov 9, 2026
RoamVault plans and prices for Japan
RoamVault for Japan FAQ.
Is there a RoamVault promo code for Japan?
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Yes. Use our code when you buy a Japan plan on MobiMatter. Enter it at checkout.
How much does the cheapest RoamVault eSIM for Japan cost?
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The cheapest RoamVault eSIM for Japan costs $5.99 and gives you 5 GB for 30 days. We recheck prices daily, so this price is up to date. You can buy it on MobiMatter, the eSIM marketplace that sells RoamVault plans.
Does RoamVault work in Japan?
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Yes, RoamVault works in Japan on its Japan-only plans. If your eSIM is installed but won't connect after you land, open your phone's settings and turn on data roaming for it. Your home SIM can stay as it is.
How much is a RoamVault eSIM for Japan for 7, 15 or 30 days?
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Every RoamVault plan for Japan lasts 30 days, so the same plans cover a 7-, 15- or 30-day trip.
Does RoamVault have an unlimited data eSIM for Japan?
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No, RoamVault has no unlimited plans for Japan, so every plan comes with a set amount of data. Its plans run at full speed with no daily limit.
What is RoamVault, and is it good for Japan?
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RoamVault eSIMs are sold through MobiMatter, an eSIM marketplace, with plans covering 18 destinations. If you want prices for other countries and the full verdict, read the RoamVault eSIM review.
How much does 1 GB of data cost with a RoamVault eSIM in Japan?
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With RoamVault, 1 GB in Japan can cost as little as $0.60, on the plan with 50 GB.
Does RoamVault have 5G in Japan?
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Yes, every RoamVault plan for Japan has 5G. Your phone needs to support 5G too: on iPhone, that means an iPhone 12 or newer.
Can I use a RoamVault eSIM as a mobile hotspot in Japan?
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Yes, every RoamVault plan lets you share data through a personal hotspot.
Does RoamVault have a phone plan with a number for Japan?
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No, RoamVault's Japan plans are data only, so your home number stays on your main SIM. You can still call and message people through WhatsApp or other apps.
Can I buy a RoamVault eSIM before my trip to Japan and use it later?
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Yes, you can buy it ahead, but activate it within 2 months of purchase. The days start with your first data use, so keep the eSIM switched off until you arrive.
Can I top up a RoamVault eSIM?
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No, RoamVault eSIMs can't be topped up. If you run out of data, you buy a new package, and it comes with a new eSIM.
Guides and reviews.
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