Airalo Moshi Moshi eSIM Review: Fast, Affordable Data in Japan
Planning a trip to Japan? Check out my review of the Airalo Moshi Moshi eSIM, which kept me connected with fast 4G data in Tokyo and beyond. I’ll discuss the easy setup process, the speeds I experienced, and how Airalo performed during my two weeks in Japan.
Note: Some links in this article are affiliate links. If you click on a link and purchase a service, I may earn a small commission at no extra cost to you. It helps me keep the blog running.
I chose Airalo’s eSIM over local SIM cards or pocket Wi-Fi rentals. I’ll cover Airalo’s reliable 4G LTE coverage and provide tips for managing your data. Whether you’re new to eSIMs or a seasoned traveller, this post will help you stay connected in Japan.
My ranking
Overall Rating
Pros & Cons
| Pros | Cons |
|---|---|
| Fast registration | No 5G |
| Easy eSIM set up and activation | No SMS and voice |
| Fast and reliable connection |
Ready for the full story? Let’s dive in.
Why I Chose Airalo Moshi Moshi eSIM
A bit Japanese at the beginning: “Moshi Moshi” (もしもし) is how you say “hello” when answering the phone in Japanese.
I chose Airalo’s Moshi Moshi eSIM for a hassle-free connection in Japan. Purchasing a physical tourist SIM can be tricky (I did that years ago when I went to Japan for the first time), so I wanted to avoid the hassle of swapping SIM cards or renting pocket Wi-Fi, which can cost $5–10 per day. With Airalo, I bought the SIM in advance and activated it upon arrival.
The Moshi Moshi plan was perfect for my trip, as it provided coverage only in Japan. Airalo offered reliable service and affordable rates, much cheaper than roaming with my UK SIM (easily £6+ per MB). Saving money while staying connected was a win!
Savvy’s Tip: Airalo Moshi Moshi is excellent if you plan to visit only Japan.
Airalo Moshi Moshi eSIM Plan Options
Airalo’s Moshi Moshi is a prepaid, data-only eSIM explicitly designed for use in Japan. It comes in multiple sizes and validities to suit different trip lengths. As of July 2025, six data packages are available.
Airalo offers competitive pricing for data plans in Japan, especially when compared to pocket Wi-Fi rentals. The Moshi Moshi plans operate on the 4G/LTE networks of SoftBank and KDDI, ensuring broad coverage by automatically switching to the best signal available.
No identification or residency is required to purchase these data-only eSIMs through the Airalo app or website.
Key points to note: Currently, the plans are limited to 4G speeds, as 5G is mainly reserved for local operators. However, 4G speeds are sufficient for streaming and video calls.
Savvy’s Tip: Ensure your phone is unlocked and compatible with eSIMs before making a purchase. While most newer smartphones support eSIM functionality, you can check Airalo’s compatibility list if you’re unsure.
How I Tested Airalo Moshi Moshi eSIM
I used the Moshi Moshi eSIM throughout my trip to Japan and tested it in various real-world scenarios each day. My phone is an unlocked dual-SIM device (Samsung Galaxy S22), which allowed me to keep my physical UK SIM card for calls and text messaging while using the eSIM for data. Here’s a summary of my experience:
Setup and installation
Setup Rating
Setting up Airalo was simple. I purchased the 1 GB/7-day Moshi Moshi plan for $4.50 through the app. After payment, I received an email with the confirmation and instructions.
At home, I connected to Wi-Fi, added the eSIM by scanning the QR code in my Android settings, and the profile was ready in seconds.
The purchase and installation took 5–10 minutes, requiring no technical adjustments.
Before I left for Japan, I enabled data roaming for the Moshi Moshi profile while keeping my primary SIM for calls/SMS.
Savvy’s Tip: Install the eSIM before travelling in a location with good Wi-Fi, and ensure your device is eSIM-compatible and unlocked. The app includes a compatibility checklist.
Network registration in Japan
Network Registration Rating
When my plane landed at Tokyo’s Haneda Airport, the actual test began. I switched off flight mode, and within seconds, my Airalo eSIM was registered on KDDI, providing me with a 4G signal.
Meanwhile, my UK physical SIM struggled to connect. The Airalo eSIM functioned as a domestic SIM, as I didn’t see the usual “R” next to the signal bar. The “R” always indicates roaming.
Savvy’s Tip: Always check if you can see these arrows going both directions. It means your phone is sending (arrow up) and also receiving (arrow down) data.
I was online before reaching immigration, which was a huge relief!
Throughout my trip, as I moved around Tokyo, Yokohama, Sapporo, and Otaru, the eSIM automatically connected to either KDDI or SoftBank, and the transition was seamless. The Airalo eSIM worked seamlessly everywhere in Japan without any issues.
Reliability and User Experience
User Experience Rating
For two weeks, I travelled through Tokyo, Yokohama, Sapporo, and Otaru, and the Airalo eSIM kept me connected without issues. The Moshi Moshi service utilises two networks (SoftBank and KDDI), ensuring I always had a signal, even in the Tokyo subway.
Using the eSIM felt just like using my regular mobile data at home. Google Maps worked perfectly whenever I needed to find a sushi or yakiniku restaurant or commute to popular tourist spots. I shared photos with my friends and family through WhatsApp and Signal, and I uploaded them to Instagram. Everything just worked.
Connectivity and Speed
Connectivity&Speed Rating
I didn’t run formal speed tests at first since I only had 1 GB of data, but my experience with the eSIM was excellent. Sharing photos, browsing the internet, and using social media apps all ran smoothly. Even while using Google Maps, I couldn’t distinguish between the travel eSIM and my regular 5G connection at home.
Overall, I’d rate the connectivity a big thumbs up 👍 for being fast and reliable!
Top-up
Top-up Rating
Airalo makes topping up easy; they inform you when your data drops below 25%, along with a link to add more.
In the Airalo app, go to My eSIMs → Moshi Moshi → Top-Up to see all the Japan plans. This flexibility enables you to start small and add data as needed, without incurring the cost of a larger plan upfront. Heavy users might prefer the 20 GB plan to avoid frequent top-ups.
The app shows each plan’s expiration date, making topping up easy and convenient.
Savvy’s tip: Adding a new plan does not extend the validity of your original plan. For instance, if your initial eSIM plan is valid for 30 days and you buy and activate a 7-day plan, the new plan will only last for 7 days. It is treated as a new eSIM plan.
Airalo Discount Codes
Who doesn’t love a discount? 😃 Use my Airalo code for $3 off or 15% off your first eSIM purchase. If you have an account, enjoy 10% off your next purchase. Here are your links:
These discounts help save a bit on your purchase. For instance, with the $3 off code, the 1 GB/7-day plan is only $1.50. A remarkable deal for the internet in Japan. Remember, you can use only one code per account, but feel free to share it with friends who are trying Airalo for the first time.
Airalo App (Android & iOS)
Airalo offers a free mobile app for both Android and iOS, which I highly recommend. It makes it easy to purchase eSIMs, manage plans, and top up your account.
The app’s dashboard conveniently tracks data usage and displays the number of days remaining on your plan. You can also receive push notifications for alerts, such as low data, if you enable them.
Download the Airalo app from the Google Play Store or Apple App Store by clicking on the icons or the official Airalo links above. Create a free account, browse eSIM packages, and purchase eSIMs directly in the app. The app simplifies eSIM installation, allowing you to install the eSIM without a QR code.
Tips for Using eSIM Data in Japan
Every country has its quirks when it comes to mobile data, and Japan is no exception. Here are some quick tips for using your eSIM effectively:
- Download your eSIM before flying: Set up your eSIM at home while on a reliable, uninterrupted Wi-Fi connection. Download essential apps, like translators and maps, in advance.
- Monitor your data usage: Use the Airalo app to track your data usage. I typically used between 500 MB and 700 MB daily. If you plan to stream or video call frequently, consider opting for a larger data plan.
- Have a backup for remote areas: While cities generally have good signal coverage, remote areas may experience issues. Download offline maps from Google Maps and keep your hotel Wi-Fi information handy.
- Keep your primary SIM for calls and SMS: The Airalo Moshi Moshi eSIM is data-only, so make sure to keep your regular SIM active for SMS and calls. Just remember to set your data connection to the eSIM.
- Use free Wi-Fi when convenient: Japan offers reliable free Wi-Fi in cafés and hotels. Take advantage of it to save your mobile data for when it is truly needed. To protect yourself, consider using a VPN.
Following these tips will help ensure a smooth connectivity experience while you are in Japan!
Pros & Cons
Airalo’s Moshi Moshi eSIM was an excellent solution for my travels in Japan. Like any service, it has its strengths and a few limitations. Here’s a summary of my experience:
| Pros | Cons |
|---|---|
| Easy purchase and setup: Buy online and activate instantly | No unlimited data option: Heavy data users may need to buy larger plans or top up. |
| Multi-network coverage: Roams on both SoftBank and KDDI for excellent signal. | Data-only plans: No voice calls or SMS; use apps for communication. |
| Fast 4G speeds: Comparable to home 5G internet | 4G/LTE only: Currently no 5G access but 4G speeds were fast. |
| Affordable pricing: Starting at $4.50, cheaper per GB than pocket WiFi or roaming. | eSIM-compatible phone required: Works for most modern devices, but not all older or carrier-locked ones. |
| Flexible plans: Options for 7, 15, or 30 days, with easy data top-ups. |
The advantages outweigh the downsides for me. The main drawback is the lack of an unlimited data package, but at $26 for 20 GB over two weeks, it wasn’t a deal-breaker. While 5G would be nice, the excellent 4G service suited my needs for messaging, social media, and watching videos on YouTube. The Moshi Moshi eSIM performs reliably.
Conclusion – Is Airalo Moshi Moshi Worth It for Japan?
After using the Airalo Moshi Moshi eSIM in Japan, I can say it’s a game-changer for travellers. Fast internet without dealing with local SIMs or pocket Wi-Fi was a huge relief.
During my two-week stay, the service was reliable for sharing experiences from modern Tokyo to onsen in Otaru. Although it doesn’t offer 5G speeds or unlimited plans, Airalo Moshi Moshi eSIM was affordable and met my needs.
Overall, the Airalo Moshi Moshi eSIM made staying connected easy, and I highly recommend it!
Ready to stay connected in Japan the easy way? I wholeheartedly suggest giving Airalo Moshi Moshi eSIM a try. It truly enhanced my travel experience.
More about eSIM for Japan and tips, check our other articles:
- Best eSIM for Japan guide – compares top providers including Airalo, Holafly and Nomad.
- Unlimited vs Fixed Data eSIM Plans – detailed comparison and cost analysis.
- Keep your phone number and use WhatsApp with eSIMs – a step-by-ste guide how to use your phone number while using WhatsApp with your travel eSIM
- Holafly Japan eSIM review – details unlimited plans and FUP.
- Nomad Japan travel eSIM review – examines fixed and unlimited day passes.
- Airalo Moshi Moshi review – outlines affordable fixed-data options.
- Ultimate eSIM guide – explains how eSIMs work and tips for installation.
Happy travels, and こんにちは (hello) to stress-free internet abroad!
Frequently Asked Questions (FAQ)
Can I make calls or send SMS with the Airalo Moshi Moshi eSIM?
Airalo’s Moshi Moshi eSIM is data-only, so it doesn’t provide a phone number for voice calls or SMS. If you need to make calls, you can keep your physical SIM for voice/SMS (incurring roaming fees) or use internet-based services like WhatsApp, Telegram, or Skype. Or try Airalo Discover eSIM, which offers SMS and voice services.
How do I top up my Airalo eSIM if I run out of data?
When your balance drops below 25 %, Airalo will email you. Simply purchase an additional plan in the “Top-Up” section of the app or website, and it will activate automatically when your original data runs out.
Is my phone compatible with Airalo Moshi Moshi eSIM?
You need an unlocked, eSIM-compatible device (e.g. recent iPhone, Google Pixel, Samsung S-series). Airalo provides a list of compatible devices on their support page, or check your manufacturer’s specs and ensure your carrier has enabled eSIM functionality before purchasing.
Make sure your device is unlocked. If your phone is still locked to your home mobile operator/carrier, it might refuse to accept a Airalo eSIM.
Does Airalo Moshi Moshi support 5G in Japan?
No. Currently, the Airalo Moshi Moshi eSIM operates on 4G/LTE because Japanese carriers, such as SoftBank and KDDI, haven’t provided 5G access to MVNOs.
Latest articles about eSIM in Japan:
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- How to Keep Your Phone Number and Use WhatsApp in Japan
- Your 2025 Guide to Picking the Right Japan eSIM
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