On this page

• Quick comparison table
• Quick picks by traveller type
• Brand by brand breakdown
• Unlimited data plans
• Setup tips and mistakes to avoid
• FAQ
• Final verdict

Airalo – Price & Plans

Airalo is the one everyone has heard of, and there is a reason. Plans for Japan start from $4 for 1GB over 3 days, with 5GB from $10 and 10GB from $18 on a 30 day window. It rides SoftBank and KDDI au, which covers cities beautifully and does fine on the Shinkansen corridor.

The thing Airalo sells that nobody else quite matches is the boring reliability of the app. Install, scan, done. On Reddit the recurring complaint is that it is not the cheapest per GB, and that support replies can be slow when something breaks at 2am in Osaka. The recurring praise is that things rarely break in the first place.

Best for: anyone buying their first eSIM who would rather pay a couple of dollars extra than troubleshoot on arrival.

Ubigi – Price & Plans

Ubigi is run by Transatel, which is owned by NTT. That matters, because it means Ubigi gets you onto NTT Docomo, the carrier with the deepest rural footprint in Japan. Plans start from $3.50 for 1GB over 3 days, 10GB runs from $14 on a 7 day window or from $16.50 across 30 days, and there is a 25GB option from $32.

I saw the same story repeated in forum threads. People who stayed in Tokyo said every provider felt identical. People who went to Nikko, the Kiso Valley, or the Noto Peninsula said Ubigi kept a signal when friends on other eSIMs had nothing. The app is plainer than Airalo’s and the interface feels a bit corporate, but the connection is the point.

Best for: trips that leave the Tokyo to Kyoto line, especially long rail journeys and countryside stays.

Nomad – Price & Plans

Nomad quietly undercuts most of the field on mid size plans. You are looking at 1GB from $4 over 7 days, 5GB from $10 across 30 days, 10GB from $16, and 20GB from $23. There is also a 7 day unlimited plan from $25, which is the cheapest unlimited option among the well known brands.

It runs on KDDI au and SoftBank. Travellers on Reddit like the top up flow, because you can add data mid trip without buying a whole new eSIM and losing your remaining balance. A few people mentioned the referral credit stacking up fast if you travel with a group, which is a nice quirk.

Best for: two to three week trips where you want 10GB or more without paying premium brand prices.

Saily – Price & Plans

Saily comes from the NordVPN team, and it shows. Pricing sits close to Airalo, with 1GB from $3.99, 5GB from $10.99, 10GB from $17.99, 20GB from $24.99, and a 7 day unlimited plan from $26.99. What you get on top is a bundle of security extras, including web protection and a virtual location feature.

Saily does not publish which Japanese carrier you land on, which bugs me a little. In practice people report solid speeds in cities. If you already pay for a VPN separately, the extras are a duplicate cost. If you do not, they are a genuine sweetener.

Best for: travellers who want data and privacy tools in one app and mostly stay in urban areas.

Holafly – Price & Plans

Holafly only sells unlimited. Seven days runs from $27.50 and thirty days from $73.90, on SoftBank and KDDI au. There is no 5GB option, no top up maths, nothing to monitor. For some people that is worth every cent.

The honest caveat, and forum users are blunt about this, is that unlimited comes with a fair use policy and hotspot limits. If your plan is to tether a laptop all day and work from a Kyoto cafe, read the terms first. If your plan is Google Maps, Instagram, and translating menus with your camera, you will never notice a ceiling.

Best for: heavy phone users who want to stop thinking about data the moment they land at Haneda.

Yoho Mobile – Price & Plans

This is where the price war gets silly. Yoho Mobile lists 1GB plans from around $1.07 on short one to seven day windows, which is a fraction of what the big brands charge. Several similar small players sit in the same bracket with sub dollar per GB rates.

The trade off is predictability. Smaller resellers route traffic through different partners, so the carrier you get can change between purchases, and support is usually a chat widget rather than a phone number. Forum users who buy these plans tend to say the same thing: great when it works, and you should have a backup plan for when it does not.

Best for: short city breaks and light users who care more about the price than the guarantee.

Sim Local – Price & Plans

Sim Local takes the daily allowance approach. A typical Japan plan runs from $26 for 10GB per day across 10 days, so instead of one big bucket you get a fresh one every morning. If you blow through it watching videos on the train, tomorrow resets.

That structure is the reason to pick it. Anyone tethering a laptop, sharing with a partner, or running a hotspot for a family of four will get more usable data out of a daily plan than a monthly pot they drain in four days. It is not the cheapest headline number, but per usable gigabyte it holds up well.

Best for: hotspot users, couples sharing one connection, and anyone who works while travelling.

What is the best eSIM for Japan for a two week trip?

For fourteen days I would take a 10GB or 20GB plan rather than unlimited. Ubigi if your route leaves the cities, Nomad if you want the lowest price at that size. Both let you top up if you run short.

How much data do I actually need in Japan?

Roughly 500MB a day covers maps, messaging, and social scrolling. Add a gigabyte a day if you stream video or upload photos in full quality. So a week is about 5GB for most people and 10GB if you are heavy handed.

Which Japanese network gives the best coverage for an eSIM?

NTT Docomo has the widest rural reach, KDDI au is a close second, SoftBank is excellent in cities and strong on urban 5G, and Rakuten Mobile is still filling gaps. In Tokyo, Osaka, and Kyoto the difference is barely noticeable.

Can I use a Japan eSIM as a hotspot for my laptop?

Usually yes on fixed data plans, since a gigabyte is a gigabyte however you spend it. Unlimited plans are where tethering gets restricted, so check the fair use terms. If hotspot is the main use, a daily allowance plan is the safer buy.

Do I get a Japanese phone number with an eSIM?

Almost never. These are data only products. You keep your own number on your physical SIM for calls and texts, and use internet based calling for everything else.

Is an eSIM better than renting a pocket Wi-Fi in Japan?

For one or two people, yes, and it is cheaper. No pickup counter, no return deadline, no second device to charge. Pocket Wi-Fi still wins for groups of three or more sharing one connection all day.

Will my phone support a Japan eSIM?

If it is an iPhone XS or newer, a Pixel 3 or newer, or a recent Samsung Galaxy S or Z model, you are fine. It must also be carrier unlocked. Some phones sold in Japan and China have eSIM disabled, so check that before buying a plan.

What happens if I run out of data mid trip?

You top up in the app, which takes a minute or two, or you buy a second eSIM entirely. Japan has plenty of free Wi-Fi in convenience stores, stations, and cafes, so you will not be stranded while you sort it out.

The short version

If you want one answer, the best eSIM for Japan in 2026 is Ubigi. It puts you on NTT Docomo, prices sit in the middle of the pack from $3.50, and it holds a signal where cheaper options quietly give up. That combination is hard to beat.

Buying your first eSIM ever, take Airalo from $4 and enjoy the smoother setup. Watching your budget on 10GB or more, take Nomad from $16. Refusing to think about data at all, take Holafly from $27.50 and accept the fair use limits.

Whichever you pick, install it at home, switch data roaming on, and give yourself one evening to test it before you leave. That single habit prevents almost every eSIM horror story I have ever read.