Best eSIM for Japan in: Airalo, Saily, Sakura Mobile, Mobal & SoftBank Compared

Planning a trip to Japan? One of the smartest things you can do before landing is setting up an eSIM.

Japan is easy to travel once you understand the basics, but you will rely on internet access constantly: Google Maps, train routes, translation apps, restaurant bookings, Suica top-ups, hotel check-ins, and messaging.

The good news is that you no longer need to search for a physical SIM card at the airport or rent a pocket Wi-Fi router. With a Japan eSIM, you can install your mobile data plan before departure and connect as soon as you arrive.

But which Japan eSIM should you choose?

In this guide, I’ll compare some of the best eSIM options for Japan, including Airalo, Saily, Sakura Mobile, Mobal, and SoftBank/Klook, so you can pick the right one based on your trip length, budget, and data needs.

Affiliate disclosure: Some links in this article are affiliate links. This means I may earn a small commission if you buy through them, at no extra cost to you. I only recommend services that I think are useful for Japan travelers.

Do You Really Need an eSIM in Japan?

Technically, you can travel in Japan using hotel Wi-Fi, convenience store Wi-Fi, and train station Wi-Fi.

But I don’t recommend relying only on public Wi-Fi.

Japan is a country where mobile internet makes your trip much easier. You will need it to:

• Check train platforms and transfer routes
• Use Google Maps or Japan Travel by NAVITIME
• Translate menus, signs, and messages
• Contact hotels, restaurants, or travel companions
• Use ride-hailing or taxi apps
• Check opening hours while moving around
• Top up or manage digital travel tools

For most travelers, an eSIM is the easiest solution because you can buy it online, install it before departure, and activate it when you arrive in Japan.

eSIM vs Pocket Wi-Fi vs Physical SIM

Before choosing a provider, it helps to understand the difference.

eSIM

An eSIM is a digital SIM installed directly on your phone. You do not need to insert a physical card.

Best for:

• Solo travelers
• Couples
• People who want a simple setup
• Travelers using modern smartphones
• Anyone who wants internet immediately after landing

The downside is that your phone must be eSIM-compatible and unlocked.

Pocket Wi-Fi

A pocket Wi-Fi is a small portable router that creates a Wi-Fi network for your devices.

Best for:

• Families
• Groups
• People using several devices
• Travelers with phones that do not support eSIM

The downside is that you need to pick it up, carry it, charge it, and return it.

Physical SIM

A physical SIM is still useful if your phone does not support eSIM.

Best for:

• Older phones
• Travelers who prefer a physical card
• People staying longer in Japan

The downside is that you need to swap your regular SIM or use a dual-SIM phone.

For most first-time visitors, I would choose an eSIM.

Read also // How to Get Internet in Japan – Pocket WiFi, eSIM and SIM Cards Compared

Before You Buy: Check These 3 Things

Before buying any Japan eSIM, check these three things.

1. Is your phone eSIM-compatible?

Not every phone supports eSIM. Newer iPhones, Google Pixel phones, Samsung Galaxy phones, and other recent models usually do, but you should always check before buying.

A simple way to check is to dial *#06#. If your phone shows an EID number, it usually means your device supports eSIM.

Read also // How to check if your phone is eSIM compatible

2. Is your phone unlocked?

Your phone must be unlocked to use an international eSIM. If your phone is locked to your home carrier, the eSIM may not work.

This is especially important if you bought your phone through a mobile carrier contract.

3. Do you need data only, or also calls/SMS?

Most Japan travel eSIMs are data-only.

That means you can use apps like WhatsApp, LINE, Messenger, FaceTime, Google Maps, Gmail, and Instagram, but you usually cannot make normal phone calls or receive regular SMS with a Japanese number.

If you need a real Japanese phone number, check Mobal instead of a standard data-only tourist eSIM.

How Much Data Do You Need in Japan?

This depends on how you travel.

Light use: 3–5 GB

Choose this if you only need maps, messaging, basic browsing, and occasional translation.

Good for:

• Short trips
• Travelers who use hotel Wi-Fi
• People who do not watch videos outside

Normal use: 10–20 GB

This is the best range for most travelers.

Good for:

• 10–14 day Japan trips
• Google Maps and NAVITIME
• Translation apps
• Restaurant research
• Social media posting
• Occasional video calls

Heavy use: 20 GB or unlimited

Choose this if you upload videos, post a lot of stories, use cloud backups, stream content, or share hotspot with other devices.

Good for:

• Long trips
• Content creators
• Digital nomads
• Families sharing data
• Heavy social media use

My advice: for a classic two-week Japan itinerary, I would not go below 10 GB unless you are very disciplined with Wi-Fi.

Best Japan eSIM Providers Compared

Instead of asking “Which eSIM is the best?”, ask:

Which eSIM is best for the way I travel?

Here is the simple breakdown.

1. Airalo Japan eSIM – Best for Most Travelers

Airalo is one of the easiest eSIM providers to recommend for Japan, especially if this is your first time using an eSIM.

It is simple, app-based, and generally budget-friendly. You choose your Japan plan, install the eSIM, and activate it when you arrive.

Why choose Airalo?

• Easy to use
• Good for first-time eSIM users
• Budget-friendly plans
• App-based setup
• Good option for short and medium trips

Possible downside

Airalo is usually data-only, so it is not the right solution if you need a Japanese phone number or regular SMS.

Best for

Choose Airalo if you want a simple Japan eSIM that works for maps, messaging, translation, train routes, and everyday travel use.

Get Airalo Japan eSIM

2. Saily Japan eSIM – Best App-Based Alternative

Saily is another strong option for travelers who want a modern app experience and a simple setup process.

It is a data-only eSIM, so normal phone calls and SMS are not included. You can still use WhatsApp, LINE, FaceTime, Messenger, Telegram, Signal, and other internet-based apps.

Why choose Saily?

• Clean app experience
• Instant digital delivery
• Flexible data plans
• Good for travelers who want a simple setup
• Useful if you like managing everything from one app

Possible downside

Do not choose Saily if you specifically need normal calls or SMS. It is mainly for mobile data.

Best for

Choose Saily if you want a straightforward travel eSIM and prefer an app-first experience.

Get Saily Japan eSIM

3. Sakura Mobile Japan eSIM – Best Japan-Focused Option

Sakura Mobile is a Japan-focused provider and a good option if you want something that feels more local than a global eSIM marketplace.

Their Japan eSIM plans are designed specifically for travelers visiting Japan, and they are a strong option if you want generous data and local-style support.

Why choose Sakura Mobile?

• Japan-focused provider
• Good for longer stays
• Useful for travelers who want more data
• Strong option for people who prefer local support
• Good for those who do not want to worry too much about running out of data

Possible downside

Sakura Mobile may cost more than the cheapest global eSIM options. If your priority is the lowest possible price, compare it with Airalo or Saily first.

Best for

Choose Sakura Mobile if you want a reliable Japan-focused eSIM and you are willing to pay a little more for peace of mind.

Get Sakura Mobile Japan eSIM

4. Mobal Japan eSIM – Best If You Need a Japanese Phone Number

This is where many travelers get confused.

Most eSIMs for Japan are data-only. That is enough for maps, messaging apps, email, social media, translation, and browsing.

But sometimes you may need a real Japanese phone number.

For example:

• Some local services require a Japanese number
• Some reservation systems ask for SMS verification
• You are staying in Japan longer
• You need calls or SMS, not just internet data
• You are moving, studying, or working in Japan

In these cases, Mobal is worth checking because it offers options with a real Japanese phone number.

Why choose Mobal?

• Options with Japanese phone number
• Voice and SMS options available
• Useful for long stays
• Good for people who need more than data
• English-language support

Possible downside

If you only need basic mobile data for a short tourist trip, Mobal may be more than you need. For a normal vacation, Airalo, Saily, Sakura Mobile, or Klook may be simpler.

Best for

Choose Mobal if you need a Japanese phone number, voice, or SMS.

Get Mobal Japan eSIM

5. SoftBank / Klook Japan eSIM – Best If You Already Use Klook

Klook offers several Japan eSIM options, including SoftBank or other local network-based plans depending on the product.

This can be convenient if you are already using Klook to book airport transfers, attractions, train passes, teamLab tickets, theme parks, or tours.

Why choose Klook?

• Convenient if you already have a Klook account
• Often easy to bundle with other travel essentials
• Good for short trips
• Many plans and durations available
• Simple QR code activation on many products

Possible downside

Klook has different eSIM products from different suppliers, so always read the details before buying. Check the validity period, data allowance, speed reduction rules, hotspot availability, and activation instructions.

Best for

Choose Klook if you want to buy your Japan eSIM together with other Japan travel essentials.

Get Japan eSIM on Klook

Which Japan eSIM Should You Choose?

Here is my simple recommendation.

If this is your first trip to Japan

Choose Airalo or Saily.

They are simple, fast to set up, and good enough for most travelers.

If you are staying 10–21 days

Choose Airalo, Saily, or Sakura Mobile, depending on how much data you need.

If you use maps, translation, and social media every day, I would choose at least 10 GB.

If you use a lot of data

Choose Sakura Mobile or a higher-data plan from another provider.

This is especially useful if you upload videos, post stories, use hotspot, or work remotely.

If you need a Japanese phone number

Choose Mobal.

Do not assume that every eSIM includes calls and SMS. Most travel eSIMs are data-only.

My Personal Recommendation

For most Japan travelers, I would keep it simple.

If you are visiting Japan for the first time and only need internet for maps, translation, messaging, and travel apps, choose Airalo or Saily.

If you want more peace of mind and a Japan-focused provider, choose Sakura Mobile.

If you need a real Japanese phone number, choose Mobal.

And if you are already using Klook for your trip, check their SoftBank or Japan eSIM options before buying elsewhere.

When Should You Install Your Japan eSIM?

I recommend buying and installing your eSIM before your flight.

Do not wait until you land in Japan to figure it out while tired, jet-lagged, and standing at the airport.

A good workflow is:

1. Buy your eSIM a few days before departure.
2. Install it while connected to stable Wi-Fi.
3. Keep your main SIM active for calls/SMS if needed.
4. Turn on the Japan eSIM only when you arrive.
5. Enable data roaming for the eSIM profile.
6. Check that mobile data is using the Japan eSIM, not your home SIM.

Important: do not delete your eSIM after installing it unless the provider tells you to. Many eSIMs cannot be reinstalled after deletion.

Common eSIM Mistakes to Avoid in Japan

Buying before checking compatibility

Always check that your phone supports eSIM and is unlocked.

Choosing too little data

Japan is a navigation-heavy country. You will use maps and train apps more than you expect.

Forgetting to enable data roaming

Many eSIMs require data roaming to be turned on for that eSIM profile.

Installing the eSIM with weak Wi-Fi

Install it at home or somewhere with a stable connection.

Assuming data-only eSIMs include calls

Most Japan travel eSIMs do not include normal phone calls or SMS.

Deleting the eSIM too early

Do not delete the eSIM unless you are sure you no longer need it.

Do You Need a VPN in Japan?

For normal travel, you do not need a VPN just to use the internet in Japan.

However, a VPN can be useful if you often use public Wi-Fi, work remotely, access sensitive accounts, or want an extra layer of privacy while traveling.

For most travelers, I would prioritize a reliable eSIM first. Then consider a VPN if you know you will be working from cafés, hotels, airports, or public networks.

FAQ: Japan eSIM

What is the best eSIM for Japan?

For most travelers, Airalo and Saily are good simple choices. Sakura Mobile is a strong Japan-focused option, Mobal is best if you need a Japanese phone number, and Klook is convenient if you already book Japan travel products there.

Is Airalo good in Japan?

Airalo is a popular option for travelers who want a simple data eSIM for Japan. It is best for maps, messaging, browsing, translation, and general travel use.

Is Saily good for Japan?

Saily is a good option if you want an easy app-based eSIM. It is data-only, so use apps like WhatsApp, LINE, FaceTime, or Messenger for calls and messages.

Can I use WhatsApp with a Japan eSIM?

Yes. Data-only eSIMs work with WhatsApp, LINE, Messenger, Telegram, FaceTime, Google Maps, Gmail, and similar apps.

Can I make phone calls with a Japan eSIM?

Most tourist eSIMs are data-only and do not include regular phone calls or SMS. If you need a Japanese phone number, check Mobal.

How much data do I need for two weeks in Japan?

For most travelers, 10–20 GB is a comfortable range for two weeks in Japan. Choose more if you upload videos, stream content, use hotspot, or work remotely.

Should I get an eSIM or pocket Wi-Fi in Japan?

For solo travelers and couples, an eSIM is usually easier. For families or groups sharing multiple devices, pocket Wi-Fi can still make sense.

Can I install my eSIM before arriving in Japan?

Yes. In fact, I recommend installing it before departure while connected to stable Wi-Fi. Then activate it when you arrive in Japan.

Will my normal SIM still work?

Yes, if your phone supports dual SIM/eSIM settings. You can usually keep your regular SIM for calls or SMS and use the Japan eSIM for mobile data.

Can I top up my Japan eSIM?

It depends on the provider and plan. Some eSIM providers allow top-ups through the app, while others require you to buy a new plan.