Ubigi vs Holafly for Japan: Price, Networks, Unlimited Data, Rural Coverage, and Hotspot Limits
Ubigi and Holafly are both worth considering for a trip to Japan, but they solve different problems.
Ubigi is strongest when you want to choose a specific data allowance and get a good overall balance of price, Japanese network access, and ease of use.
Holafly is strongest when you want unlimited data on your phone and would rather not keep checking how many gigabytes you have left.
So the real question is not simply which eSIM is better. It is whether you want to estimate your data needs and optimize for balance, or pay for the simplicity of not managing a data allowance.
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 Holafly for Japan?
2. Ubigi vs Holafly in 30 Seconds
3. The Biggest Difference — Balance vs Unlimited Simplicity
5. Which Is Better If You Need Around 5–10GB?
6. What If You Expect to Use 20GB or More?
7. Which Is Better for Unlimited Data?
8. What “Unlimited” Really Means with Holafly
9. Which Japanese Networks Do They Use?
10. Which Is Better for Rural Japan?
12. Which Is Better on the Shinkansen?
13. Hotspot / Tethering — Which Is Better for a Laptop?
14. Which Should You Choose for a 7-, 10-, 14-, or 21-Day Trip?
15. Which Is Better for Heavy Video and Social Media Use?
16. Which Is Better for a First Trip to Japan?
1. Quick Verdict — Ubigi or Holafly for Japan?
Project Torii Quick Verdict
Ubigi → 🟢 Strong Choice — Network / Coverage / Balance
Holafly → 🟡 Good for the Right Traveler — Unlimited / Simplicity
These ratings match the Travel Match framework in our main Japan eSIM guide. Ubigi is a Strong Choice because it works well for a broad range of travelers, including first-time visitors. Holafly can be an excellent fit if unlimited phone data is your priority, but its value depends more heavily on how you use your phone, how much you care about price, and whether you need substantial hotspot data.
Choose Ubigi if you:
are visiting Japan for the first time
expect around 5–10GB to be enough
will travel beyond the biggest cities
value access to KDDI and NTT Docomo
want more flexibility for hotspot / tethering
want the option to top up
want to reuse the same eSIM profile on future trips
care about overall balance rather than one standout feature
→ Choose Ubigi for your Japan trip
Choose Holafly if you:
do not want to think about remaining data
want unlimited phone data to be the priority
use a lot of video or social media on your phone
do not want to estimate how many GB you will need
like choosing a plan around the length of your trip
only need around 1GB of hotspot data per day
The simplest answer: choose Ubigi for balance. Choose Holafly if you want to stop thinking about remaining phone data.
2. Ubigi vs Holafly in 30 Seconds
| Feature | Ubigi Japan | Holafly Japan |
|---|---|---|
| Project Torii Travel Match | Strong Choice | Good for the Right Traveler |
| Core strength | Network / Coverage / Balance | Unlimited / Simplicity |
| Japan networks | KDDI / NTT Docomo | KDDI / SoftBank* |
| 5G | Supported | Where available* |
| Fixed-data plans | Yes | Unlimited-focused |
| 10GB | US$16.50 / 30 days | — |
| Unlimited | Available — check current terms | Core offering |
| Unlimited structure | Check the exact plan terms | No fixed data cap; FUP may apply |
| Hotspot / tethering | Data sharing supported | 1GB / day* |
| Top-up / extra days | Top-ups supported | New plan required for more days |
| Install before travel | Yes | Yes |
| Reuse | Reusable eSIM in 200+ destinations | Ongoing-use features including Always On |
| Best for | Broad range of Japan travelers | Unlimited-first travelers |
* Holafly network, 5G, and Japan hotspot details are aligned with Project Torii’s audited Holafly Detailed Review. Always recheck the current plan details before purchase.
3. The Biggest Difference — Balance vs Unlimited Simplicity
Ubigi is built around choosing the amount of data you need and getting a strong balance of price, network access, and usability. Holafly is built around removing the need to manage a data allowance on your phone.
Ubigi
Ubigi’s 10GB / 30-day Japan plan is US$16.50. It lists KDDI and NTT Docomo in Japan and supports Smartstart, top-ups, data sharing, and eSIM reuse. In Project Torii’s Pillar guide, we position it as a Strong Choice and a particularly well-rounded option for a first trip to Japan.
Holafly
Holafly’s core proposition is unlimited data. Instead of mainly deciding whether to buy 5GB, 10GB, or 20GB, you choose a plan duration that matches the length of your trip and can use your phone without constantly monitoring the remaining GB.
→ Read the full Holafly review
4. Price Comparison
The reference prices in this comparison were rechecked on August 26, 2026. Prices, promotions, currencies, and plan lineups can change, so always confirm the final checkout price before buying.
Ubigi
| Plan | Validity | Reference price |
|---|---|---|
| 3GB | 15 days | US$7.50 at audit |
| 10GB | 30 days | US$16.50 |
| 25GB | 30 days | US$32 at audit |
Ubigi’s 10GB / 30-day plan was reconfirmed at US$16.50 on August 26, 2026. Ubigi also offers Japan Unlimited plans, but their duration, price, and fair-use conditions can change. Check the exact Plan Details when you buy.
Holafly
| Unlimited plan length | Reference price at audit |
|---|---|
| 3 days | US$11.90 |
| 5 days | US$20.50 |
| 7 days | US$27.50 |
| 10 days | US$36.50 |
| 15 days | US$50.50 |
| 30 days | US$73.90 |
Holafly lets you choose an unlimited-data plan around the length of your trip. Project Torii’s audited Detailed Review confirmed a broad range of trip lengths, but because plan lineups can change, this article uses the more durable wording: choose the number of days that fits your trip.
The pricing logic is straightforward: if you can estimate how much data you need, Ubigi will often cost less. If you would rather not estimate or manage your usage at all, Holafly’s unlimited model can be worth paying more for.
5. Which Is Better If You Need Around 5–10GB?
Project Torii Lean: Ubigi
If 5–10GB is likely to be enough, paying extra for unlimited data is often unnecessary. Ubigi’s 10GB / 30-day plan is US$16.50 and is also the reference Ubigi plan used in our Pillar comparison.
→ How much data do you need for Japan?
6. What If You Expect to Use 20GB or More?
We would not automatically choose Holafly just because your estimate is above 20GB.
If you can reasonably predict that your whole trip will use around 20–25GB, compare Ubigi’s larger fixed-data options. If your reaction is, “I have no idea whether 25GB will be enough, and I do not want to keep checking,” Holafly becomes more compelling.
Project Torii’s decision rule: can estimate your usage → Ubigi. Do not want to estimate or manage it → Holafly.
7. Which Is Better for Unlimited Data?
Do not choose based on the word “Unlimited” alone.
Ubigi Unlimited
Ubigi does offer Japan Unlimited plans. As of our August 26, 2026 recheck, the current 15-day plan includes 30GB at full speed before being optimized to 2 Mbps, while the 30-day plan includes 60GB at full speed before being optimized to 2 Mbps. These terms can change, so check the exact Plan Details for validity, price, full-speed allowance, and post-throttle conditions when you buy.
Holafly Unlimited
Holafly’s Japan offering centers on unlimited data with no fixed data cap that automatically stops your usage. However, speed may still be subject to a local network provider’s Fair Use Policy. Unusually heavy usage can therefore result in temporary speed reductions.
Want clearly defined fixed data that you can manage → Ubigi. Want to stop thinking about remaining GB on your phone → Holafly.
8. What “Unlimited” Really Means with Holafly
Unlimited does not mean guaranteed maximum speed at all times
Holafly’s unlimited plans do not have a fixed data cap that automatically cuts off your service. But local network providers may apply Fair Use Policy rules, including temporary speed restrictions after unusually heavy high-speed usage.
In other words, unlimited data and unlimited full-speed data are not the same thing.
Hotspot is not unlimited either
Hotspot, also called tethering, means sharing your phone’s mobile data connection with another device such as a laptop, tablet, or another phone.
For Japan, Project Torii’s audited Holafly information lists hotspot sharing at 1GB per day. So “unlimited” does not mean unlimited laptop data.
9. Which Japanese Networks Do They Use?
Ubigi lists KDDI and NTT Docomo for Japan. Its current Japan plan information also shows 5G support.
Project Torii’s audited Holafly Detailed Review and Pillar guide list KDDI and SoftBank for Holafly in Japan.
In our Japan Mobile Networks guide, we use a simple traveler-oriented framework: NTT Docomo = Coverage, KDDI / au = Reliability, SoftBank = Speed / Urban Performance. These are useful tendencies, not absolute rankings.
→ Docomo vs au vs SoftBank in Japan
10. Which Is Better for Rural Japan?
Project Torii Lean: Ubigi
The reason is its KDDI + NTT Docomo network combination. For regional, rural, and nature-heavy itineraries, Project Torii places more weight on geographic coverage, so access to NTT Docomo is a positive factor.
That does not mean Ubigi works everywhere in Japan. For remote mountain areas, islands, or sparsely populated regions, check the underlying carrier’s official coverage map. If your trip is mainly Tokyo, Osaka, and Kyoto, you probably do not need to overthink this network difference.
11. Speed and 5G
There is no clear overall winner. Ubigi explicitly lists 5G for its Japan plan, while Project Torii’s audited Holafly review lists 5G where available.
Real-world performance can vary with the connected network, location, congestion, device, supported bands, roaming setup, and routing. We do not treat a speed test of the underlying Japanese carrier as if it were automatically the real-world speed of a travel eSIM using that carrier.
12. Which Is Better on the Shinkansen?
There is no clear winner.
High-speed movement, tunnels, mountainous sections, cell handovers, and congestion can temporarily affect either service. Ubigi gets a slight overall lean for trips that cover more regional Japan, but we would not claim that it is always faster or more reliable specifically on the Shinkansen.
Project Torii Local Tip
Do not plan your entire data allowance around relying on Shinkansen Wi-Fi. It is useful to have your own mobile data available for maps, train information, hotel details, booking confirmations, and translation.
13. Hotspot / Tethering — Which Is Better for a Laptop?
Ubigi
Ubigi supports data sharing. With a fixed-data plan, hotspot usage comes from the data allowance you purchased.
Holafly
Holafly’s Japan plan focuses on unlimited data on your phone, but Project Torii’s audited Japan information lists hotspot sharing at 1GB per day.
That may be enough for light email and web browsing, but it can be restrictive for video calls, large uploads, cloud syncing, or video.
Between these two providers, frequent hotspot use → Ubigi. If hotspot use is only occasional and 1GB/day is enough → Holafly can still work.
14. Which Should You Choose for a 7-, 10-, 14-, or 21-Day Trip?
Project Torii uses the following rough planning figures in our data-usage guide:
| Trip length | Typical planning allowance |
|---|---|
| 5 days | Around 3GB |
| 7 days | Around 5GB |
| 10 days | 5–10GB |
| 14 days | Around 10GB |
| 21 days | 10–20GB |
→ How much data do you need for Japan?
7 days
For typical use, a fixed-data plan is easy to compare, so we lean Ubigi. Choose Holafly if unlimited simplicity matters more.
10 days
A typical planning range is 5–10GB, which makes Ubigi the easier default for many travelers.
14 days
Around 10GB is a practical starting point. Ubigi’s 10GB / 30-day plan at US$16.50 is a straightforward option.
21 days
A typical planning range is 10–20GB. Choose Ubigi if you can estimate your needs; choose Holafly if you do not want to estimate or manage them.
15. Which Is Better for Heavy Video and Social Media Use?
For heavy on-phone data use, Project Torii leans Holafly.
If you regularly watch YouTube, TikTok, Instagram Reels, or other video-heavy content while traveling and do not want to keep asking, “How many GB do I have left?”, Holafly’s unlimited model is easier to live with.
But heavy hotspot use is a different case. Holafly Japan’s audited hotspot allowance is 1GB per day, so travelers who expect to share a lot of data with a laptop should compare Ubigi more closely.
Heavy phone data → Holafly. Heavy hotspot use → Ubigi.
16. Which Is Better for a First Trip to Japan?
Project Torii Lean: Ubigi
Our Pillar guide positions Ubigi as a strong all-round choice for a first trip to Japan. The combination of a US$16.50 10GB / 30-day plan, KDDI + NTT Docomo access, Smartstart, top-ups, data sharing, and eSIM reuse gives it a particularly balanced profile.
Holafly can still be the better choice if your main priority is simplicity: “This is my first eSIM, I do not want to choose a data allowance, and I just want to use my phone without watching the meter.”
17. Setup, Top-Ups, and Reuse
Ubigi
Ubigi can be installed before your trip. With Smartstart, the data plan begins when you arrive in a covered destination. Ubigi also supports top-ups, data sharing, and reuse of the same eSIM in 200+ destinations.
Holafly
Holafly can also be installed before travel and activated for use at your destination. Current trip eSIMs do not support traditional top-ups or plan extensions; if you need more days, you must purchase a new eSIM plan and install a new profile. Holafly also offers Always On backup data. Always On should be understood as a separate ongoing-use benefit tied to the eSIM, not as extra data added to your Japan Unlimited plan.
18. Calls and SMS
Do not buy either Japan travel eSIM expecting a Japanese 090 / 080 phone number or conventional voice calls and SMS.
Ubigi is a data-only service. Project Torii’s audited Holafly Japan review likewise lists no Japanese phone number and no conventional voice calls or SMS.
Internet-based calling and messaging apps such as LINE, WhatsApp, FaceTime, Messenger, and Signal work over mobile data.
19. Who Should Choose Ubigi?
First-time visitors to Japan
Travelers who expect around 5–10GB to be enough
Travelers who can estimate their data needs reasonably well
People visiting regional or rural areas
Travelers who value NTT Docomo access
People who care about network access and coverage
Travelers who expect to tether more often
People who want top-ups
Travelers who want to reuse the same eSIM later
In one sentence: Ubigi is for travelers who want a strong balance of network access, price, data allowance, and usability.
20. Who Should Choose Holafly?
Travelers who prioritize unlimited phone data
People who do not want to monitor remaining GB
Travelers who do not want to estimate their data needs
Heavy video users on their phone
Frequent Instagram / TikTok users
Travelers who want to choose a plan around trip length
People for whom 1GB/day of hotspot data is enough
Travelers who value simplicity over optimizing cost per GB
In one sentence: Holafly is for travelers who want to use their phone without thinking much about remaining data.
21. Project Torii Verdict
We do not name one universal winner. For a typical Japan trip, however, we think Ubigi fits a broader range of travelers. This conclusion is also consistent with our Pillar guide.
Ubigi — Best for Network & Balance
Ubigi’s strength is the overall package: KDDI + NTT Docomo, 10GB / 30 days for US$16.50, Smartstart, top-ups, data sharing, and eSIM reuse.
Holafly — Best for Unlimited & Simplicity
Holafly’s biggest advantage is that it removes much of the mental overhead of managing phone data. For unlimited-first travelers, that simplicity is the product.
| Your trip / priority | Project Torii Choice |
|---|---|
| First trip to Japan | Ubigi |
| Around 5–10GB | Ubigi |
| 10GB | Ubigi |
| Regional / rural travel | Ubigi |
| Network / coverage priority | Ubigi |
| NTT Docomo access matters | Ubigi |
| Unlimited is the priority | Holafly |
| Do not want to think about remaining data | Holafly |
| Heavy video / social media on phone | Holafly |
| Frequent hotspot use (between these two) | Ubigi |
| Heavy laptop tethering | Ubigi |
| 1GB/day hotspot is enough | Holafly can work |
| Top-ups / reuse matter | Ubigi |
| Mostly Tokyo / Osaka / Kyoto | Either can work |
Project Torii Bottom Line
Choose Ubigi for Network / Coverage / Balance. Choose Holafly for Unlimited / Simplicity. If you can estimate your data needs and want to balance price, network access, and usability, choose Ubigi. If you would rather stop estimating and managing your remaining phone data, choose Holafly.
→ Read the full Holafly review
→ Compare the best eSIMs for Japan
→ Check Ubigi’s latest plans and prices
→ Check Holafly’s latest plans and prices
22. FAQ
Ubigi or Holafly: which is better for Japan?
For a typical traveler, we’d start with Ubigi. Choose Holafly if unlimited phone data and not monitoring your remaining GB are higher priorities.
Which is cheaper?
Ubigi will often cost less when you know roughly how much data you need. Its 10GB / 30-day Japan plan is US$16.50.
Which is better for unlimited data?
Choose Holafly if your goal is to stop thinking about remaining phone data. Ubigi also offers Unlimited plans, but check the current Plan Details because the exact structure can change.
Is Holafly really unlimited?
There is no fixed data cap that automatically cuts off usage, but Fair Use Policy rules may allow temporary speed reductions after unusually heavy use.
Is Holafly hotspot unlimited too?
No. Project Torii’s audited Japan information lists 1GB of hotspot data per day.
Which is better for rural Japan?
Project Torii leans Ubigi because it can access KDDI and NTT Docomo.
Which networks do they use in Japan?
Ubigi lists KDDI and NTT Docomo. Project Torii’s audited Holafly review lists KDDI and SoftBank.
Do both support 5G?
Ubigi lists 5G on its Japan plan. Project Torii’s audited Holafly review lists 5G where available.
Which is better on the Shinkansen?
There is no clear winner. High-speed travel, tunnels, mountains, handovers, and congestion can affect either service.
Which is better for a laptop?
Ubigi is generally easier to recommend for heavy tethering. Holafly Japan’s audited hotspot allowance is 1GB per day.
Do they include a Japanese phone number?
Do not assume either Japan travel eSIM includes a Japanese phone number. Ubigi is data-only, and Project Torii’s audited Holafly Japan review lists no Japanese phone number.
23. Sources & Evidence
Project Torii prioritizes first-party provider information and audited internal Project Torii assets.
Ubigi Official Information
Japan fixed-data plans
10GB / 30 days — US$16.50
KDDI / NTT Docomo
5G
Smartstart
Top-ups
Data sharing
Reusable eSIM
Holafly Official / Audited Information
Japan Unlimited plan
Fair Use Policy
Trip-length-based plan selection
KDDI / SoftBank — audited Detailed Review
5G where available — audited Detailed Review
1GB/day hotspot in Japan — audited Detailed Review
Installation / activation
No traditional top-up / extension; new plan required / Always On
Project Torii Internal Assets
eSIM Pillar
Ubigi Detailed Review
Holafly Detailed Review
Japan Mobile Networks
How Much Data Do You Need in Japan?
Airalo vs Holafly
Ubigi vs Nomad
Ubigi vs Airalo
Nomad vs Airalo
Prices, network listings, Unlimited conditions, hotspot allowance, Always On conditions, and plan structure rechecked: August 26, 2026.
Pillar consistency: Ubigi remains a Strong Choice and Holafly remains Good for the Right Traveler. The Pillar positions Ubigi as an all-round option for a first trip to Japan and Holafly as a strong fit for travelers who want to stop thinking about remaining phone data.
Project Torii Editorial Note
Editorial Principle
Prices, plan lineups, networks, Fair Use Policy terms, and hotspot conditions can change. Unlimited plans in particular should be checked against the exact Plan Details shown at purchase.
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; Fair Use Policy, high-speed conditions, and hotspot limits 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/
Holafly Japan eSIM: https://esim.holafly.com/esim-japan/
Holafly Terms and Conditions: https://esim.holafly.com/terms-and-conditions/
Holafly Always On FAQ: https://esim.holafly.com/faq/about-esims/stay-online-with-always-on/
Holafly Top-Up Help: https://esim.holafly.com/faq/how-to-use-an-esim/top-up-data-holafly-esim/