Osaka Prefecture’s Essential Travel Companion: Unlimited Data 5G SIM Card for Japan, Kansai Airport

Picture this: You land at Kansai International Airport, luggage in hand, eager to start exploring Japan. But before you dive into the sights—whether it’s Osaka’s lively streets, historic Kyoto temples, or the bustling markets—you need reliable internet. That’s where the Unlimited Data 5G SIM Card from Telecom Square comes in. Priced at just $16.28 per person, it offers up to 10 days of seamless connectivity and covers most of Japan, including major cities and remote regions alike.
What makes this SIM stand out? First, the blazing-fast 5G speeds mean you can stream, scroll, and download without a hiccup—even in crowded spots. Second, it’s truly unlimited—no data caps or throttling—so you can keep sharing your adventures with friends or navigating new neighborhoods without worry. We love how simple it is to pick up at Kansai Airport and start using immediately, especially with clear instructions included.
However, one thing to keep in mind: this SIM is only for your mobile phone—not a WiFi router—so if traveling with a group needing multiple connections, you might need extra devices or a different solution. Also, since it’s a prepaid SIM, no changes or refunds are possible once you’ve booked, so planning your trip duration carefully is wise.
This experience suits travelers who value reliable, high-speed internet without the hassle of local SIMs or portable WiFi rentals. If you’re planning to navigate public transportation, look up restaurant reviews online, or share your trip on social media, this SIM keeps you connected effortlessly.
Key Points

- Lightning-fast 5G data ensures smooth streaming and browsing throughout your trip.
- Unlimited data means no worries about extra charges or throttling—stay connected as long as you need.
- Nationwide coverage works well in major cities like Osaka, Kyoto, and beyond, providing consistent service across Japan.
- Simple pickup at Kansai Airport makes it easy to start your journey without delays.
- Excludes voice calls and texts, so plan accordingly if those are essential for your trip.
- Prepaid, non-refundable booking emphasizes the importance of planning your travel dates carefully.
Planning more time in Osaka Prefecture? We've covered other experiences worth considering.
Exploring the Practicalities of the Unlimited Data 5G SIM Card

When we think about traveling through Japan, especially regions like Osaka Prefecture, staying connected is more than convenience—it’s almost essential. From navigating public transit to sharing your latest photos, a reliable internet connection acts as a digital safety net. The Telecom Square SIM card offers just that, combining affordability with performance.
For $16.28, you get a SIM card that works with 5G speeds—a significant upgrade from traditional 4G options. Think about how quickly you can upload videos, find the best ramen spot, or check train schedules without frustrating delays. The unlimited data aspect removes the stress of watching your usage, especially if you’re a social media enthusiast or rely on map apps.
The coverage area is another plus. The SIM promises nationwide coverage, meaning whether you’re exploring Osaka’s lively Dotonbori district, wandering Kyoto’s historic alleys, or venturing into less populated areas, your connection remains stable. This is especially helpful if you want to avoid the hassle or expense of rent-a-WiFi devices.
The pickup process is straightforward, with the SIM available at Kansai International Airport during business hours. The included instruction manual guides you through activation, making setup as painless as possible—no tech headaches, just instant connectivity.
One limitation to note: this SIM is not for voice calls or texts. If you’ll need to make calls, you might want to pair it with a VoIP app or use your existing international plan. Also, be aware that the Fair Usage Policy might limit your data if you stream or download excessively, but most travelers won’t notice, given the generous limits.
This SIM offers excellent value for budget-conscious travelers who want dependable, fast internet without complicated setups or extra fees. It’s perfect for those who plan to use their phone as a navigation device, photo-sharing hub, or social connector.
Detailed Breakdown of the Experience
Arrival at Kansai International Airport
Immediately after arriving at Kansai Airport, you’ll find the Telecom Square counter or designated pick-up point. The process is streamlined—simply present your booking confirmation, and they’ll hand over your pre-activated SIM card along with the instruction manual. We found this step quick and stress-free, especially compared to waiting for international data plans to activate or fiddling with rental WiFi units.
The instructions clearly explain how to insert the SIM and activate it, ensuring even the least tech-savvy travelers can get online swiftly. Once installed, the device automatically connects to the network—no fiddling with APN settings or lengthy procedures.
Coverage in Osaka and Beyond
Once activated, the speed and reliability impress. We loved the way the 5G speeds handled streaming a travel vlog, downloading offline maps, and posting on social media—all simultaneously and without lag. Whether you’re navigating the busy streets of Osaka’s Dotonbori entertainment district or riding the shinkansen to Kyoto, your connection remains solid.
Travelers have noted that the SIM provides extensive coverage across Japan, including rural areas, so you won’t be cut off just when you’re beginning to explore hidden gems. This peace of mind is invaluable when you’re trying to find that tiny ramen shop or get directions during a busy festival.
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Practical Benefits for Travelers
The unlimited data plan is a real game-changer. We’ve all experienced the frustration of watching a video buffer or losing connection just when you’re about to capture the perfect sunset shot. With this SIM, those worries fade away. You can stream your favorite music, download travel guides offline, or keep your friends updated without any additional charges. It’s like having a reliable internet provider in your pocket, no matter where you go.
Since the SIM doesn’t include voice or text, you’ll want to consider alternative options if those are vital. However, for most travelers, using messaging apps and data-driven services covers the essentials.
Who Will Love This Service?
This SIM is ideal for independent travelers, digital explorers, and social media enthusiasts who don’t want to fuss over their internet connection. It’s perfect for those planning to spend their time sightseeing, shopping, or dining and need dependable access to maps, translation apps, or online reviews.
It also suits those on a budget, given the competitive price and no hidden fees. If you prefer the simplicity of prepaid plans and value fast, unlimited data, this is an excellent choice.
Potential Drawbacks to Consider
The main thing to remember is that this SIM does not include voice calls or texts—a limitation for travelers relying on traditional phone services. If you need to call hotels or local contacts via a regular number, you’ll need to supplement this plan with an app or an additional service.
Also, since no refunds are allowed after purchase, you should be confident about your travel dates and duration. If your plans change unexpectedly, this could be inconvenient.
Who Is This Tour Best For?

If you’re a traveler who values speed and reliability over bells and whistles—a person who wants to explore without worrying about losing internet access—this SIM is a superb choice. It’s especially well-suited for those planning to spend several days in Japan, using their phone as their primary navigator and communication device.
It’s also ideal for budget travelers who want quality connectivity for a fraction of the cost of renting portable WiFi or purchasing international plans through their carrier.
However, if you need voice calls and texts, or plan to travel with a group requiring multiple devices, you might want to explore additional options.
Final Thoughts

Traveling in Japan is an adventure, but staying connected shouldn’t be a source of stress. The Unlimited Data 5G SIM Card from Telecom Square provides speed, coverage, and affordability, making it a smart pick for most independent travelers. For just over $16, you get a piece of peace of mind that keeps you connected from the moment you land at Kansai Airport through your days exploring Osaka and beyond.
Enjoy the flexibility of unlimited data, the confidence of nationwide coverage, and the simplicity of straightforward pickup and activation. This SIM can truly enhance your trip—allowing you to focus on what’s most important: discovering Japan’s many delights.
Whether you’re snapping photos, navigating busy streets, or sharing your journey in real-time, this SIM is a solid companion for travelers who want reliable, fast internet at an excellent price.
FAQ

Is the SIM card available at Kansai International Airport?
Yes, the SIM card can be picked up directly at Kansai Airport during business hours, making it very convenient for travelers arriving in Japan.
Does the SIM include voice calls and texts?
No, this SIM is only for mobile data. If you need to make voice calls or send texts, consider using messaging apps or pairing it with a VoIP service.
How long can I use this SIM?
The SIM is suitable for 4 to 10 days, depending on your travel plans. It’s booked in advance and is ideal for short-term trips.
Can I use this SIM in rural areas of Japan?
Yes, the SIM offers nationwide coverage, including rural regions, so you can stay connected even outside major cities.
What happens if I don’t pick up the SIM during the specified time?
If the SIM isn’t collected during business hours or before the designated date, your booking becomes invalid, and no refund will be issued.
Is there a limit on data usage?
While the plan is unlimited, there is a Fair Usage Policy that might limit data if you stream or download excessively, but most travelers won’t encounter this issue.
Travel with confidence, stay connected, and make the most of your trip to Japan with this practical, affordable SIM card. It’s a small investment with a big payoff—smooth internet, stress-free navigation, and the freedom to explore fully.
More Tour Reviews in Osaka Prefecture
- Private Transfer from Itami Airport ITM to Kyoto City by Minivan
- Shared Arrival Transfer : Kansai International Airport to Kyoto City
- Kyoto to Gokayama ShirakawaGo Day Tour
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More Osaka Prefecture experiences we've covered
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- Kyoto to Gokayama ShirakawaGo Day Tour
- Osaka Int Airport (ITM) to Osaka city – Arrival Private Transfer
- Shared Arrival Transfer: Osaka Itami Airport to Kyoto City
- Best way to travel in Osaka
- Osaka Int Airport (ITM) to Osaka – Round-Trip Private Transfer
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- Private arrival transfer from Kansai airport to Kobe City & Arima Onsen
- Private Full-Day Japanese Mountain Guided Tour: Ikoma
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