NEW! Mobal eSIMs Better Than Airalo and Ubigi?

Mobal eSIMs offer a straightforward solution for staying connected in Japan, eliminating high international roaming fees.

This guide details what an eSIM is, a digital SIM card built into most modern phones, and why Mobal is a recommended provider. It explores Mobal’s use of the reliable Docomo network, English-language support, and transparent pricing.

You’ll find a breakdown of their data-only and voice + data plans for short and long-term stays, a comparison with competitors like Airalo and Ubigi, and an extensive FAQ section to address common concerns.

Picture this: You’re standing at the famous Shibuya Crossing in Tokyo, surrounded by thousands of people, neon signs flashing everywhere, and you need to find your hotel.

Without internet access, you’re essentially lost in one of the world’s busiest intersections. Now imagine confidently pulling out your phone, opening Google Maps, and navigating like a local because you have reliable, affordable internet access.

After decades of helping folks like you discover authentic Japan experiences, I can tell you that staying connected isn’t just convenient—it’s essential. Traditional international roaming can cost you hundreds of dollars for a single trip to Japan. I’ve seen travellers who didn’t plan ahead get hit with shocking phone bills when they return home.

That’s why I want to share all you need to know about Mobal eSIMs—a solution that gives you reliable connectivity without the financial stress. Don’t worry if you’ve never used an eSIM before; I’ll explain everything in simple terms so you can make an informed decision about staying connected during your Japan adventures.

What is an eSIM? (It’s simpler than you think)

The term “eSIM” might sound intimidating. Let me put your mind at ease—think of an eSIM as a digital SIM card that’s already built into your phone. Instead of fumbling with a tiny plastic card that you could easily lose, everything happens digitally.

Here’s why eSIMs are actually often better:

No tiny card to lose or break: You don’t want to accidentally snap your physical SIM card in half while trying to install it in a Tokyo coffee shop. With an eSIM, there’s nothing physical to handle.

Instant activation: You don’t need to wait for shipping or visit a store. You can set up your eSIM within minutes of purchasing it online.

Keep your home number active: This is huge—you can use both your home SIM and the Japanese eSIM simultaneously*. Your family can still reach you on your regular number while you’re using Japanese data.

*PRO TIP: As some USA iPhone models only have eSIM and no physical SIM slot, you will need to check if your phone supports two active lines simultaneously (either eSIM + physical SIM, or dual eSIM).

Now, you might be wondering if your phone can handle this technology. Most smartphones from 2018 onwards support eSIMs, including iPhone XS and newer models, plus many Android phones. Here’s a simple way to check: dial *#06# on your phone. If you see a 32-digit number called an EID, you’re all set for eSIM technology.

Why I recommend Mobal for Japan eSIMs

After researching dozens of connectivity options, I consistently recommend Mobal, and here’s why you should consider them too:

My wife and I have used Mobal for years: including their SIM cards and Wi-Fi routers. We’ve even used their service down in the remote Yaeyama Islands with no connectivity issues at all – I was surprised and impressed!

They’ve been doing this longer than anyone: Mobal was founded in 1989—that’s more than 35 years experience helping international travellers stay connected. They’ve served over 250,000 travelers and have been featured in publications like Frommer’s, Budget Travel, and TIME Magazine. This isn’t some startup that might disappear next year.

They use Japan’s best network: Mobal eSIMs connect to the Docomo network, which is Japan’s premium carrier with over 99% population coverage. This means you’ll have excellent signal whether you’re in downtown Tokyo or hiking the rural Kumano Kodo.

Real English support when you need it: Should something go wrong with your connection (and sometimes it can), you need real help from people who understand your situation. Mobal has native English-speaking customer service representatives who actually know Japan.

They do good in the world: I especially value that the majority of Mobal’s profits go to charity, specifically Seibo, which feeds hungry children around the world. Your purchase helps make a difference beyond just your trip.

No surprise charges: What you see is what you pay. No activation fees, no hidden taxes, no termination charges. After dealing with too many travel services that nickel and dime customers, this transparency is welcome.

Mobal classifies their eSIMs into two categories: Short-Term and Long-Term solutions. Short means less than 90 days (the length of Japan’s standard tourist visa). Long-term eSIMs are for 90 days or more.

Their short-term eSIMs are perfect for tourists and business travellers. Their long-term Japan eSIMs are ideal if you are living, working or studying in Japan.

Your Mobal eSIM options explained

Let me break down your options based on different travel scenarios I see most often:

Data-Only eSIMs (Perfect for most short-term visitors)

If you’re planning a typical Japan vacation, these are probably your best bet:

8-Day Plans (ideal for a week-long trip):

• 3GB for ¥2,340 (about $15 USD) – good for basic needs
• 10GB for ¥2,750 (about $18 USD) – my recommendation for most visitors
• 30GB for ¥3,200 (about $21 USD) – if you plan to share lots of photos and videos

16-Day Plans (perfect for longer explorations):

• 3GB for ¥2,800 – minimal usage
• 10GB for ¥3,300 – moderate usage
• 50GB for ¥3,900 – heavy usage with streaming
• 100GB for ¥6,500 – unlimited peace of mind

31-Day Plans (for extended stays):

• 10GB for ¥3,850
• 50GB for ¥4,900
• 100GB for ¥8,000

You might need a Japanese phone number on an eSIM for various reasons, including making reservations, accessing local services, and receiving verification codes for apps and websites. Having a Japanese phone number also allows for easy contact with emergency services – should you ever need them. It can also be helpful for long-term stays or when official documents require a local phone number.

The following plans include everything above plus the ability to make and receive calls with a real Japanese phone number:

Voice + Data eSIMs (If you need a Japanese phone number)

Short-term options:

• 30 Days: ¥7,920
• 60 Days: ¥12,870
• 90 Days: ¥17,820

Long-term solution: ¥2,970 setup fee, then monthly plans starting at ¥1,650.

PRO TIP: Mobal’s long-term voice + data eSIM solution can be cancelled anytime so these plans are also available to tourists – the only difference is that you need to terminate the service yourself, whereas the short-term options have an automatic end date.

Voice Lite eSIM

• No minimum duration: ¥2,970 + ¥990 per month (includes 500MB of data)

Mobal’s Voice Lite eSIM has only 1 plan. With no minimum duration, you get a Japanese phone number and SMS capability—perfect if you just need a local number for reservations and bookings. You pay ¥2,970 for the eSIM and then ¥990 per month after activating it. You can cancel anytime. The first month is charged on a pro-rated basis.

PRO TIP: The Voice Lite plan includes 500MB of data per month – but it’s best to turn off ‘Mobile Data’ as if you run over the included data, an additional fee applies.

All of Mobal’s long-term plans (90+ days) include the following:

How Mobal eSIMs stack up against the competition

I get asked all the time about other eSIM providers, so let me give you an honest comparison. While researching the options, including several ‘big name’ popular alternatives to Mobal, and here’s what I’ve found:

Mobal vs. Airalo Japan eSIMs

You might see Airalo advertised with slightly cheaper prices upfront, and they do offer a slick global app that works in multiple countries. However, here’s where Mobal wins for Japan specifically:

Mobal uses the premium Docomo network directly, while Airalo typically relies on roaming partnerships that can be less reliable. When you’re trying to catch the last train in Osaka and need to check the schedule, network reliability matters more than saving a few bucks.

Mobal also provides native English customer support based in Japan. If you run into issues at 10pm in Shibuya, you can reach someone who understands both the technical side and the local context. Airalo’s support, while decent, doesn’t have that Japan-specific expertise.

Mobal vs. Ubigi and Nomad eSIM

These providers offer modern apps and competitive pricing, but they’re typically part of larger global networks without deep Japan market knowledge. What I appreciate about Mobal is their 35 years of experience specifically in the Japanese telecoms world.

When you choose Mobal, you’re getting a company that understands unique aspects of Japan’s telecom environment—like why you might need a real Japanese phone number for certain services, or how to navigate the complexities of Japan’s regulatory requirements.

The real differentiator: Support when you need it

Here’s what really sets Mobal apart: when something goes wrong, you get real help. I’ve heard many stories from people who bought cheap eSIMs online only to find themselves with no internet access and no way to get help while standing in the arrivals lounge of Narita Airport.

Mobal provides 24/7 English support via email, live chat, and social media. Their team consists of people who actually understand Japan, not just generic tech support reading from scripts.

Which Mobal eSIM should you choose?

Based on the thousands of Japan explorers I’ve helped over the years, here’s my advice:

If you’re visiting Japan for 1-2 weeks as a tourist: Go with the 8 or 16-day data-only plans. The 10GB option is my sweet spot recommendation—it gives you plenty of data for maps, translation apps, social media, and staying in touch with home without worrying about running out.

If you’re travelling for business: Consider the Voice + Data short-term plans. Having a Japanese phone number makes everything easier when dealing with hotels, restaurants, and business contacts.

If you’re a digital nomad or studying in Japan: The long-term Voice + Data solution offers the best value. You get a real Japanese number plus flexible data plans you can adjust monthly.

How much data do you actually need? Here’s my rule of thumb:

• Light user (maps, messaging, occasional social media): 3-10GB
• Moderate user (regular social media, photo sharing, video calls home): 10-30GB
• Heavy user (streaming video, uploading content, working online – this includes me): 50GB+

Remember, even if you exceed your limit, your service doesn’t stop—it just slows down to 200 Kbps, which is still enough for basic functions like maps and messaging.

Setting up your Mobal eSIM – it’s easy

I know technology setup can feel intimidating, but I’ve walked clients through this process, and it’s genuinely simple:

1. Purchase online: Use your credit card or PayPal—takes about 2 minutes
2. Check your email: You’ll receive setup instructions with a QR code
3. Install the eSIM: Go to your phone’s settings and scan the QR code
4. Activate: Follow the simple prompts on your phone
5. Connect automatically: Your phone will connect to the Docomo network

The entire process typically takes less than 10 minutes, and you can do it from your hotel room in Japan or even before you leave home. I always recommend doing a test setup before your trip so you’re comfortable with the process.

What happens when you use all your data?

This is one of the most common concerns I hear: “What if I run out of data?” Here’s the good news—you won’t be left stranded.

When you reach your data limit, your Mobal eSIM continues working but at a reduced speed of 200 Kbps. While this isn’t fast enough for Netflix, it’s perfectly adequate for:

• Using Google Maps for navigation
• Sending messages on WhatsApp or LINE
• Basic web browsing
• Checking email
• Making emergency calls (on voice plans)

Most importantly, you’ll never get surprise charges. Unlike some carriers that hit you with expensive overage fees, Mobal’s approach is transparent and predictable.

Frequently Asked Questions about Mobal eSIMs

Will my current phone work with Mobal eSIMs?

Most smartphones from 2018 onwards support eSIMs, including iPhone XS and newer, and Android devices. Your phone also needs to be “unlocked”—meaning it’s not restricted to work only with your home carrier. If you bought your phone directly from a carrier like AT&T or Verizon, it might be locked. Contact them about unlocking it before your trip.

Do I need to remove my home SIM card?

Absolutely not! This is one of the biggest advantages of eSIM technology. You can keep your home SIM active and choose which connection to use for data. Your family can still reach you on your regular number while you’re using the Japanese eSIM for internet access.

How’s the coverage in rural areas of Japan?

Excellent question, especially if you’re planning to visit places like Mount Fuji, rural onsen towns, or hiking trails. Mobal uses the Docomo network, which has the best coverage in Japan, reaching over 99% of the population. Both my wife and I have used Mobal’s service down in the remote Yaeyama Islands with no issues on connectivity.

Can I share my internet connection with other devices?

Yes, most Mobal eSIM plans support mobile hotspot functionality, though this isn’t guaranteed on every device. This means you can share your connection with a travel companion’s phone or use it on your laptop. Just remember that hotspot usage counts toward your data allowance.

What if I run into problems while in Japan?

This is where Mobal really shines. They provide 24/7 English-language support through multiple channels—email, live chat, and social media. Their support team consists of native English speakers who understand both the technical aspects and the Japan travel context. I’ve personally interacted with their support team, and they’re genuinely helpful.

Are there any hidden fees or long-term contracts?

No contracts, no activation fees, no termination charges. All prices include applicable taxes. This transparency is refreshing in a market known for surprise charges. What you see in this guide and on their website is exactly what you’ll pay.

Can I get a real Japanese phone number?

Yes, with Voice + Data or Voice Lite plans, you get a genuine Japanese phone number (070, 080, or 090 prefix). This is essential if you’re staying longer-term or need to interact with Japanese services that require local numbers. Many hotels, restaurants, and services in Japan prefer or require Japanese phone numbers for reservations.

How do data-only eSIMs handle phone calls and texts?

Data-only plans don’t include traditional voice calling or SMS. However, you can use internet-based communication apps like WhatsApp, LINE (very popular in Japan), FaceTime, or Google Voice. Since these apps use your data connection, you can still make “calls” and send messages.

What makes Mobal different from other Japan eSIM providers?

Three key differentiators: First, they use the premium Docomo network directly rather than cheaper roaming partnerships. Second, they offer genuine English support from people who understand Japan. Third, they have 35 years of experience in Japanese telecoms, so they understand the market’s unique (and regulatory) requirements.

Can I activate my eSIM before arriving in Japan?

You can install the eSIM profile on your phone anytime after purchase, but the service typically activates when you first connect to a network in Japan. I recommend installing it before you travel so everything’s ready when you land.

What if my phone doesn’t support eSIMs?

No problem—Mobal also offers traditional physical SIM cards with the same great service and pricing. They have both options available to accommodate different device capabilities. I have a separate post about this here: Mobal SIM Card Review: Still A Great Option?

Is Mobal more expensive than other eSIM providers?

While Mobal’s upfront prices might be slightly higher than some generic providers, you get superior network quality, better customer support, no hidden fees, and the peace of mind that comes with an established company. In my experience, the small price difference is worth it for the reliability and support quality. Plus, when buying from Mobal, you’re helping feed children in poverty.

Money-saving tips for staying connected during your Japan trip

Here are some practical ways to maximise your connectivity budget:

Compare the real cost to international roaming: Before you think eSIMs are expensive, check what your home carrier charges for Japan roaming. Most US carriers charge $10-15 per day, which means a two-week trip could cost $140-210 just for basic data access. A Mobal eSIM for the same period typically costs under $25.

Consider group sharing: If you’re travelling with family or friends, one person with a higher-data plan can create a mobile hotspot for others. This can be more economical than buying individual plans for everyone.

Download before you go: Use your hotel WiFi to download offline maps, translation apps, and travel guides. This reduces your data usage for basic travel needs.

Understand your usage patterns: Track your current data usage at home for a week to understand your typical needs. Many people overestimate how much data they’ll use while travelling abroad.

My final recommendation

After helping thousands of travellers stay connected in Japan, I consistently recommend Mobal. And their eSIMs solve the real problems you’ll face: reliable connectivity, transparent pricing, and support when you need it.

Yes, you might find slightly cheaper options, but when you’re standing in a Japanese train station at rush hour and your connection isn’t working, those few dollars in savings won’t matter. What matters is having reliable internet access and the ability to get help in English when you need it.

Mobal gives you both, backed by 35 years of experience serving international travellers. Their partnership with the Docomo network ensures excellent coverage throughout the country, and their commitment to transparent pricing means no surprise charges on your credit card.

My advice? Order your Mobal eSIM a few days before your departure. This gives you time to familiarise yourself with the setup process and ensures you’re ready to connect the moment you land in Japan. Don’t let connectivity concerns distract from what should be an incredible adventure.

Instead, focus on discovering authentic ramen shops, soaking in natural hot springs, and experiencing the hospitality that makes Japan special. Let Mobal handle keeping you connected to the world—and to the amazing experiences waiting for you in Japan.

Further Related Guides

Mobal SIM Card Review: Still A Great Option?

Mobal WiFi Review: The Pocket WiFi Alternative?

Is it Safe To Use Free WiFi in Japan? 5 Risks and How to Avoid Them

38 Japan Travel Sites and Resources Every Traveller Should Know

More Planning Resources

Planning Travel Hub

My List of Recommended Japan Travel Resources

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My Japan Travel Store

The Real Japan Travel Store