Ubigi vs Airalo for Japan: Pricing, Networks, Unlimited Data, Hotspot Use, and Ease of Use
Ubigi and Airalo are both strong eSIM options for travel in Japan. Both can be set up before your trip, both offer fixed-data and Unlimited options, and both support hotspot / tethering.
The simplest difference is this: Ubigi is the stronger fit if you care most about Japanese network access, regional coverage, a roughly 10GB plan, or the structure of the Unlimited plans. Airalo is especially attractive if you want smaller data packages such as 1GB, 3GB, or 5GB, or simply want a wider range of plan choices.
The comparison becomes most useful when you look at small-data plans, 10GB pricing, how each provider defines Unlimited, which Japanese networks are available, rural travel, hotspot use, and eSIM reuse.
This guide works backward from the way you actually travel, so you can answer one practical question: for your Japan trip, should you choose Ubigi or Airalo?
Affiliate disclosure: Some links on this page are affiliate links. If you make a purchase through them, Project Torii may earn a commission at no extra cost to you. This does not affect our recommendations.
Contents
1. Quick Verdict — Ubigi or Airalo for Japan?
2. Ubigi vs Airalo at a Glance
3. The Biggest Difference — Ubigi for Network Access, Airalo for Plan Choice
5. Which Is Better for 3GB or 5GB?
7. Which Is Better for Unlimited Data?
8. Which Japanese Networks Do They Use?
9. Which Is Better for Rural and Mountainous Japan?
11. Which Is Better on the Shinkansen?
12. Hotspot / Tethering — Which Is Better for a Laptop?
13. Which Should You Choose for a 7-, 10-, 14-, or 21-Day Trip?
14. Which Is Better for Heavy Video and Social Media Use?
15. Which Is Better for a First Trip to Japan?
1. Quick Verdict — Ubigi or Airalo for Japan?
Project Torii Quick Verdict
Ubigi → 🟢 Strong Choice — Network Access / Regional Travel / Balance
Airalo →🟢 Strong Choice — Plan Choice / Small-Data Flexibility
Project Torii rates both as Strong Choice options. For Japan specifically, however, we lean Ubigi for first-time visitors, regional travel, around 10GB, and Unlimited. Airalo is especially attractive for smaller 1–5GB plans and for travelers who value having more plan choices.
Choose Ubigi if you:
are visiting Japan for the first time
expect to use around 10GB
will travel beyond the major cities
care about which Japanese networks your eSIM can access
specifically value access to NTT Docomo
are considering Unlimited data
want easy top-ups
want to keep and reuse the same eSIM profile on future international trips
→ Choose Ubigi for your Japan trip
Choose Airalo if you:
only need around 1GB, 3GB, or 5GB
are taking a short trip
mainly use Maps, translation, and messaging
do not need a large data allowance
may use hotspot / tethering
want a broad choice of fixed-data and Unlimited plans
may also use Airalo regional or global plans on future trips
The shortest version: around 10GB, rural travel, or Unlimited → Ubigi. Around 1–5GB, a short trip, or maximum plan choice → Airalo.
2. Ubigi vs Airalo at a Glance
| Feature | Ubigi Japan | Airalo Japan |
|---|---|---|
| Project Torii rating | Strong Choice | Strong Choice |
| Networks in Japan | KDDI / NTT Docomo | KDDI / SoftBank |
| 5G | Supported on Japan plans | Check the specific package |
| 1GB | — | about US$4–4.50 |
| 3GB | US$7.50 / 15 days | about US$7.50–8 |
| 5GB | — | about US$10–10.50 |
| 10GB | US$16.50 / 30 days | about US$17–18 |
| 20–25GB | 25GB / US$32 | 20GB / about US$25 |
| Unlimited | Yes | Yes |
| Hotspot / tethering | Yes | Yes |
| Top-ups | Yes | Available on eligible plans |
| Install before travel | Yes | Yes |
| eSIM reuse | Designed for easy profile reuse | Eligible existing eSIMs can be topped up* |
| Main strength | Network Access / Regional Travel / Balance | Plan Choice / Small-Data Flexibility |
* If an existing Airalo eSIM supports top-ups and is still installed on your device, you may be able to reuse it. Airalo generally warns that a deleted eSIM cannot simply be reinstalled, so do not delete it if you may need it again.
Choose in 30 seconds
Need 1GB → Airalo
Need 3GB → effectively a tie
Need 5GB → Airalo
Need 10GB → Ubigi
Need around 20GB → Airalo is attractive
Want Unlimited → Ubigi
Lots of rural or nature travel → Ubigi
Value hotspot flexibility → Airalo is also strong
3. The Biggest Difference — Ubigi for Network Access, Airalo for Plan Choice
The easiest way to understand this comparison is: Ubigi stands out for its network access in Japan, while Airalo stands out for the breadth of its plan selection.
Ubigi
Ubigi officially lists KDDI and NTT Docomo in Japan. In Project Torii’s independent network guide, we broadly associate NTT Docomo with coverage and KDDI / au with reliability and consistency.
→ Docomo vs au vs SoftBank in Japan
Airalo
Airalo’s main strength is plan choice. Its Japan lineup includes fixed-data options such as 1GB, 3GB, 5GB, 10GB, and 20GB, as well as Unlimited plans. That makes it easy to stay with one provider whether your trip is light-use or data-heavy.
Airalo also sells local, regional, and global eSIMs. If Japan is only one stop on a multi-country trip, that broader product ecosystem can be useful.
4. Price Comparison
The prices below are reference prices captured by Project Torii on August 11, 2026. Network listings, plan structure, and Unlimited conditions were rechecked on August 26, 2026. Prices, promotions, plan lineups, display regions, currencies, and checkout conditions can change, so always confirm the final price before buying.
Ubigi
| Data | Validity | Reference price |
|---|---|---|
| 3GB | 15 days | US$7.50 |
| 10GB | 30 days | US$16.50 |
| 25GB | 30 days | US$32 |
| Unlimited | 7 days | US$25 |
| Unlimited | 15 days | US$39 |
| Unlimited | 30 days | US$65 |
At the August 11, 2026 recheck, Ubigi’s 30-day Unlimited plan was US$65, with up to 60GB at full speed before speeds were reduced to 2Mbps.
Airalo
| Data | Typical validity | Reference price |
|---|---|---|
| 1GB | short-term | about US$4–4.50 |
| 3GB | up to around 30 days | about US$7.50–8 |
| 5GB | up to around 30 days | about US$10–10.50 |
| 10GB | up to around 30 days | about US$17–18 |
| 20GB | up to around 30 days | about US$25 |
| Unlimited | 3 days | US$11.50 |
| Unlimited | 5 days | US$17 |
| Unlimited | 7 days | US$27 |
| Unlimited | 10 days | US$34.50 |
| Unlimited | 15 days | about US$48–49 |
| Unlimited | 30 days | US$69 |
Airalo prices and validity periods can vary by package and display region, so Project Torii treats these as reference prices rather than permanent fixed prices.
On price alone, Airalo is especially attractive around 1–5GB, Ubigi has the edge around 10GB, and Airalo is competitive again around 20GB. For Unlimited, compare the high-speed terms rather than price alone.
5. Which Is Better for 3GB or 5GB?
3GB
Ubigi offers 3GB / 15 days for US$7.50. Airalo was about US$7.50–8 for 3GB at the evidence check. The price difference is negligible. For a typical 7- to 14-day trip, the validity difference is unlikely to matter much, so this is effectively a tie.
5GB
Airalo is the easier choice if you specifically want around 5GB, with reference pricing of about US$10–10.50.
Not sure whether you need 3GB, 5GB, or 10GB?
→ How much data do you need for Japan?
6. Which Is Better for 10GB?
At the August 11, 2026 evidence check, Ubigi’s 10GB / 30-day plan was US$16.50, while Airalo’s 10GB option was around US$17–18. The price gap is small, but Ubigi was slightly cheaper.
Ubigi also brings its KDDI + NTT Docomo network combination. For that reason, Project Torii leans Ubigi at 10GB.
Airalo can still be the more convenient choice if you already prefer its platform, expect to use its regional or global products, or simply value keeping more plan options under one account.
7. Which Is Better for Unlimited Data?
Do not compare Unlimited plans by the word ‘Unlimited’ alone. The important questions are how much high-speed data you receive and what happens after you reach that allowance. The terms below were rechecked on August 26, 2026.
Ubigi Unlimited
| Validity | Price | Full-speed allowance | After allowance |
|---|---|---|---|
| 7 days | US$25 | up to 25GB | 2Mbps |
| 15 days | US$39 | up to 30GB | 2Mbps |
| 30 days | US$65 | up to 60GB | 2Mbps |
Airalo Unlimited
Under Airalo’s default Fair Use Policy, Unlimited plans include 3GB of high-speed data per 24-hour period. After that, speeds are reduced to 1Mbps. The allowance resets every 24 hours from the eSIM activation time. If a specific package lists different terms, those package-specific terms take priority.
What does that mean on a 7-day trip?
Ubigi costs US$25 and gives you up to 25GB at full speed across the trip, followed by 2Mbps. Airalo costs US$27 and, under the default FUP, gives you 3GB of high-speed data in each 24-hour period, followed by speeds of 1Mbps until the next reset.
If you use only 1GB on one day but then need 8GB for video or hotspot use on another, Ubigi lets you use its full-speed allowance unevenly across the trip, while Airalo resets its high-speed allowance every 24 hours. This can make Ubigi more flexible when your heavy-use days are concentrated.
Project Torii lean: Ubigi for Unlimited.
8. Which Japanese Networks Do They Use?
Ubigi
Ubigi officially lists KDDI and NTT Docomo in Japan.
Airalo
Project Torii’s audited Airalo Detailed Review and current Japan information list KDDI and SoftBank.
Do not assume that the network name alone tells you which eSIM will always be faster. Project Torii’s shorthand is: Docomo for coverage, au / KDDI for reliability and consistency, and SoftBank for download speed and strong urban performance. These are broad tendencies, not absolute rankings; real-world results vary with location, time, congestion, and other conditions.
→ Docomo vs au vs SoftBank in Japan
9. Which Is Better for Rural and Mountainous Japan?
Project Torii lean: Ubigi.
The main reason is its KDDI + NTT Docomo network access. For trips with substantial regional, rural, mountainous, or nature-focused travel, access to NTT Docomo is a positive factor.
Hokkaido
Tohoku
regional cities
mountain areas
nature-focused trips
suburban areas
travel between regional cities
That does not mean Ubigi guarantees service everywhere in Japan. If your itinerary includes a specific mountain, remote island, or very sparsely populated area, check the carrier’s official coverage map as well.
If your trip is mainly Tokyo, Osaka, and Kyoto, there is much less reason to overthink the network difference.
10. Speed and 5G
Project Torii does not declare a universal speed winner. Real-world performance depends on the connected network, location, congestion, device, supported bands, roaming configuration, routing, and other factors.
We also do not take a domestic KDDI, Docomo, or SoftBank speed test and present it as if it were a direct Ubigi or Airalo speed test.
5G
Ubigi explicitly lists 5G support for its Japan plans. Airalo offers 5G-capable eSIMs, but Project Torii does not make a blanket claim that every current Airalo Japan local package is 5G-enabled. Check the package details before purchase.
11. Which Is Better on the Shinkansen?
There is no clear winner. High-speed travel, tunnels, mountainous sections, cell handovers, congestion, and the train environment can all cause temporary slowdowns or dropouts.
Project Torii Local Tip
Do not reduce your mobile-data allowance too aggressively just because the Shinkansen offers Wi-Fi. Maps, train information, hotel details, booking confirmations, and translation tools are important enough that having your own mobile connection is the safer baseline.
If your trip includes a lot of regional travel, we still lean Ubigi on the broader coverage story. That is not the same as saying Ubigi will always be faster on the Shinkansen.
12. Hotspot / Tethering — Which Is Better for a Laptop?
Hotspot, also called tethering, lets your phone share its mobile-data connection with a laptop, tablet, or another phone.
Ubigi
Ubigi supports data sharing on its standard and Unlimited plans.
Airalo
Airalo supports personal hotspot use. Under its Unlimited Fair Use Policy, Airalo does not impose a separate small hotspot-only data cap. However, tethered traffic still uses the same 3GB / 24-hour high-speed allowance.
What if you expect heavy laptop use?
If your laptop usage is concentrated on particular days, Ubigi Unlimited can be easier to manage because its full-speed allowance is measured across the trip rather than as a small daily high-speed bucket.
Airalo remains flexible for hotspot use because there is no separate small tethering allowance. If your total daily high-speed use is likely to stay within roughly 3GB, it can work very well.
Ubigi = more flexible use of a trip-wide full-speed allowance. Airalo = strong hotspot flexibility within its daily high-speed allowance.
13. Which Should You Choose for a 7-, 10-, 14-, or 21-Day Trip?
First, if you are not sure how much data you actually need:
→ How much data do you need for Japan?
| Trip length | Typical planning baseline |
|---|---|
| 5 days | about 3GB |
| 7 days | about 5GB |
| 10 days | 5–10GB |
| 14 days | about 10GB |
| 21 days | 10–20GB |
7 days
For typical use, an Airalo plan around 5GB is easy to justify. If you want Unlimited, compare Ubigi first.
Lean: typical use → Airalo / heavy use or Unlimited → Ubigi
10 days
A practical baseline is around 5–10GB. Light users can look at Airalo 5GB; for typical to heavier use, we would compare Ubigi 10GB first.
14 days
Around 10GB is a useful starting point. Project Torii leans toward Ubigi 10GB. If you want Unlimited, Ubigi’s 15-day plan is also a strong option.
21 days
A practical baseline is around 10–20GB. If 20GB is enough, Airalo is attractive on price. If you want more headroom, compare Ubigi 25GB. For Unlimited, Ubigi’s 30-day plan is also worth considering.
14. Which Is Better for Heavy Video and Social Media Use?
If around 20GB is enough, Airalo’s 20GB plan is attractive on price. If you want roughly 20–25GB, Ubigi’s 25GB plan is another option. If Unlimited is the priority, Project Torii leans Ubigi.
Around 20GB at a lower price → Airalo. More headroom → Ubigi 25GB. Unlimited → Ubigi.
15. Which Is Better for a First Trip to Japan?
Project Torii lean: Ubigi.
The eSIM Pillar also positions Ubigi as a Strong Choice for first-time visitors. The reason is its overall balance: KDDI + NTT Docomo, 10GB for US$16.50, Smartstart, top-ups, eSIM reuse, and competitive Unlimited terms.
That does not mean every first-time visitor should automatically choose Ubigi. If you are staying for about a week, mainly use Maps and translation, and expect 5GB to be enough, Airalo’s smaller fixed-data plans are very sensible.
16. Setup, Top-Ups, and Reusing the eSIM
Ubigi
Ubigi offers Smartstart. You can install the eSIM before departure, and the validity period begins after you arrive in the covered destination and connect to an eligible network.
You can leave the same Ubigi eSIM profile installed and buy another plan for supported destinations later. Top-ups are also available through the app.
Airalo
Airalo can also be purchased and installed before travel. If an existing eSIM supports top-ups, you may be able to keep it installed and reuse it. Airalo’s local, regional, and global product range also makes it convenient to keep using the same platform on future trips.
Do not casually delete an Airalo eSIM if you may need it again. Airalo generally says deleted eSIMs cannot simply be reinstalled.
17. Calls and SMS
Ubigi is data-only and does not include a Japanese phone number, conventional voice calls, or standard SMS.
For the Airalo Japan local data plans compared here, do not buy the plan expecting a Japanese phone number or ordinary cellular calls and SMS. Check the exact plan type before purchase.
Data-based services such as WhatsApp, LINE, FaceTime, and Messenger work over the eSIM’s internet connection.
18. Who Should Choose Ubigi?
First-time visitors to Japan
Travelers who expect to use around 10GB
Travelers going beyond the biggest cities
People who care about Japanese network access
People who specifically value NTT Docomo access
Travelers considering Unlimited data
People who may use a lot of hotspot data on particular days
Travelers who want easy top-ups
People who want to keep and reuse the same eSIM profile
In one sentence: choose Ubigi if you want a balanced Japan eSIM with a particularly strong network story.
19. Who Should Choose Airalo?
Travelers who only need around 1GB, 3GB, or 5GB
Short-trip travelers
People who mainly use Maps and translation
Light-data users
Travelers who want around 20GB at an attractive price
People who value hotspot flexibility
Travelers who want a broad choice of fixed-data and Unlimited plans
People who may also want regional or global plans on the same platform
In one sentence: choose Airalo if you want to match your data allowance closely to your trip and value having more plan choices.
20. Project Torii Verdict
We do not name one universal overall winner. Ubigi and Airalo are both Strong Choice options, but they are strong for different reasons.
Ubigi | Best for Network & Balance
Its strengths are the KDDI + NTT Docomo network combination, competitive 10GB pricing, Smartstart, top-ups, easy eSIM reuse, and strong Unlimited terms.
Airalo | Best for Plan Choice & Small-Data Flexibility
Airalo offers a wide range from small 1GB, 3GB, and 5GB packages through 20GB and Unlimited. Its hotspot rules are flexible, and its local / regional / global ecosystem gives travelers more ways to stay on one platform.
| Your trip | Project Torii choice |
|---|---|
| First trip to Japan | Ubigi |
| Need 1GB | Airalo |
| Need 3GB | Close to a tie |
| Need 5GB | Airalo |
| Need 10GB | Ubigi |
| Need 20GB | Airalo |
| Want Unlimited | Ubigi |
| Lots of rural / mountainous travel | Ubigi |
| Mostly Tokyo / Osaka / Kyoto | Either is easy to justify |
| Mainly Maps and translation | Airalo is also attractive |
| Heavy social media use | Depends on the allowance you need |
| Heavy hotspot use on particular days | Compare Ubigi Unlimited first |
| Value hotspot flexibility | Airalo is also strong |
| Want to reuse the same eSIM profile | Ubigi |
| Want regional / global plans on the same platform | Airalo |
Project Torii Bottom Line
Choose Ubigi for its network-access story and overall balance. Choose Airalo for plan choice and small-data flexibility. Airalo is especially easy to justify below 5GB, while Ubigi becomes stronger around 10GB, Unlimited, and regional travel. Around 20GB, Airalo’s pricing is attractive. In short: Airalo is the better fit when you want to fine-tune the plan to your data needs; Ubigi is the better fit when you want a balanced Japan-focused option with stronger network and Unlimited arguments.
→ Compare the best eSIMs for Japan
→ Check Ubigi’s latest plans and prices
→ Check Airalo’s latest plans and prices
21. FAQ
Ubigi or Airalo for Japan: which is better?
Both are Strong Choice options. Project Torii leans Ubigi for a first trip, regional travel, around 10GB, and Unlimited. Airalo is especially attractive for smaller data plans and broader plan choice.
Which one is cheaper?
It depends on how much data you need. Airalo is attractive at smaller allowances, Ubigi has the edge around 10GB, and Airalo is competitive again around 20GB.
Which is better for 3GB?
It is effectively a tie. Ubigi was US$7.50 and Airalo was about US$7.50–8 at the evidence check.
Which is better for 5GB?
Airalo. Its 5GB plan was about US$10–10.50.
Which is better for 10GB?
Project Torii leans Ubigi. At the August 11, 2026 evidence check, Ubigi was US$16.50 and Airalo was about US$17–18.
Which is better for 20GB?
Airalo’s 20GB plan at about US$25 was attractive. Ubigi’s next comparable option was 25GB for US$32, which gives you more data.
Which is better for Unlimited?
Project Torii leans Ubigi. Ubigi’s 7-day plan provides up to 25GB at full speed before 2Mbps. Airalo’s default FUP provides 3GB of high-speed data per 24 hours before speeds are reduced to 1Mbps.
Which is better for rural Japan?
Project Torii leans Ubigi because it can access KDDI and NTT Docomo.
Which networks does Airalo use in Japan?
Project Torii’s audited Airalo review lists KDDI and SoftBank for the current Japan offering.
Do they support 5G?
Ubigi explicitly lists 5G for its Japan plans. For Airalo, check the specific Japan package details rather than assuming every local package is 5G-enabled.
Which is better on the Shinkansen?
There is no clear winner. High-speed travel, tunnels, mountains, congestion, and handovers can affect either service.
Can I use hotspot / tethering?
Yes, both support it. On Airalo Unlimited, tethered traffic still uses the same 3GB / 24-hour high-speed allowance under the default FUP.
Can I use the eSIM again on a future trip?
Ubigi is designed to let you keep the same eSIM profile and buy plans for 200+ destinations. Airalo can also support reuse through eligible top-ups, and its local / regional / global plans make the platform useful for future trips.
22. Sources & Evidence
Project Torii prioritizes first-party provider information and audited internal Project Torii assets for this comparison.
Ubigi Official Information
Japan fixed-data plans
Japan Unlimited plans
KDDI / NTT Docomo
5G
Smartstart
Top-ups
Data sharing / tethering
eSIM reuse
Airalo Official Information
Japan fixed-data plans
Japan Unlimited plans
KDDI / SoftBank
5G availability guidance
Hotspot / tethering
Installation / activation
Top-ups / reuse
Local / regional / global plans
Project Torii Internal Assets
eSIM Pillar
Ubigi Detailed Review
Airalo Detailed Review
Japan Mobile Networks
How Much Data Do You Need in Japan?
Airalo vs Holafly
Ubigi vs Nomad
Network listings, plan structure, and Unlimited conditions rechecked: August 26, 2026. Reference prices captured: August 11, 2026.
Project Torii Editorial Note
Editorial Principle
Prices, plan lineups, networks, and Unlimited conditions can change. Project Torii does not treat the performance of the underlying Japanese carrier as identical to the real-world performance of a travel eSIM using that carrier. We also do not judge an Unlimited plan by the word ‘Unlimited’ alone; the full-speed allowance and post-throttle speed matter.
Project Torii does not recommend an eSIM simply because it pays a higher affiliate commission. We separate official product information, independent network evidence, local experience, practical limitations, and price wherever possible.
Trust over commissions.
Source URLs — Editorial Reference
Ubigi Japan plans: https://cellulardata.ubigi.com/data-plans-and-coverage/ubigi-esim-data-plans/?one-off=on&monthly=on&annual=on&destination=jpn
Ubigi Help Center: https://cellulardata.ubigi.com/help-center/
Airalo Japan eSIM: https://www.airalo.com/japan-esim
Airalo Unlimited Data Plans — Fair Use Policy: https://www.airalo.com/m/resources/unlimited-data-plans-fair-use-policy
Airalo Top-Up Help: https://www.airalo.com/help/using-managing-esims/ZSEEHBT5HW6F/how-can-i-top-up-an-esim/2DMCF3341SYF
Airalo eSIM Reuse Help: https://www.airalo.com/help/using-managing-esims/ZSEEHBT5HW6F/can-i-use-my-existing-esim-again/ZX3MKHJZ6HIR
Airalo Reinstallation Help: https://www.airalo.com/help/using-managing-esims/ZSEEHBT5HW6F/can-i-reinstall-an-esim/54MPGHA4TCY1