Planning your Japan trip and looking for the best unlimited eSIM Japan?
If you’re traveling from Malaysia, we’ve compared the top choices to help you stay connected easily and affordably.
Many Malaysians buy Japan eSIMs from Klook, BuzzyBee and Shopee, where you can pay in Ringgit and enjoy simple activation.
If you prefer international brands, Ubigi and Holafly also offer Japan eSIMs with unlimited data plans.
Unlimited eSIM Japan plans make it easy to stay connected in Japan—no roaming fees, no SIM card swapping. Most Malaysians can activate these eSIMs directly on their smartphones, with simple QR code setup or via an app, before flying
Of course, if you prefer to stick with your local telco, data roaming from Maxis, Celcom, or Digi is also an option. However, these plans usually cost more compared to travel eSIMs.
In this 2025 guide, we break down the best unlimited eSIM Japan options for Malaysians—comparing price, coverage, speed, and fair usage limits—so you can decide which data plan works best for your trip.
Overall Comparison Table
The unlimited eSIM options for Japan come with big differences in pricing, features, and fair usage policies. It’s important to understand these details before your Malaysia→Japan trip so you don’t end up with unexpected costs.
For this comparison, we’ve used 7-day plans Unlimited eSIM japan plan to give you a clear side-by-side look at pricing, data policies, and who each option is best for.
Here’s how the best unlimited eSIM Japan providers compare—and how Maxis roaming stacks up too.
| Provider | 7 days Price (MYR) | Data Policy | Best For |
|---|---|---|---|
| BuzzyBee | RM67.50 (Now RM39 Promo) | KDDI – 5G, True unlimited with no speed cap | Value & Unlimited High Speed plan |
| Klook | RM63.35 | Docomo – 4G | Value seekers. 180 days activation |
| Shopee | RM70 | Multiple – 4G, FUP applies | budget-conscious traveler |
| Ubigi | RM110 (USD 26) | KDDI, docomo, 3G/4G/5G, FUP applies | Extensive global coverage |
| Holafly | RM132.97 (€26) | KDDI, 5G, True unlimited with no speed cap | Specialises in unlimited data plans |
| Maxis | RM69 | Limited “unlimited” with FUP | Malaysians seeking familiar provider |
Note: Prices may vary; check official websites for current rates
Fair Usage & Network Speed: What Malaysians Need to Know
Most “unlimited” eSIM plans for Japan come with Fair Usage Policies (FUP). Typically, this means your speed may slow down after using 2.5–3GB of data per day. For Malaysians planning to stream videos, navigate with Google Maps, or stay active on social media, it’s important to check this before choosing a plan.
Speed & Network Differences
Not all eSIM providers use the same network, and this affects your data speed and coverage. Here’s a quick guide:
KDDI (au) (eg., BuzzyBee, Ubigi, Holafly)
Speed tests reached 1132 Mbps download and 71.4 Mbps upload, making it ideal for traveler who need true 5G with no speed cap.Docomo-based providers (e.g., Klook)
Typically offer 64–129 Mbps download speeds, but are known for stronger coverage in rural areas—a good option if you’re exploring beyond Tokyo and Osaka.SoftBank
SoftBank is commonly used for tourist SIMs and eSIMs in Japan. It offers decent speed but often focuses more on urban areas.Rakuten Mobile
Rakuten has improved in urban areas but still lags behind in coverage compared to KDDI and Docomo. Some budget eSIMs use Rakuten, so it’s good to check if you plan to visit less populated regions
For more details, refer to the attached Opensignal Japan Network Experience Report (April 2025). The report shows KDDI (au) as the best for 5G speed, while Docomo leads in nationwide coverage.
BuzzyBee
At BuzzyBee, we designed our unlimited Japan eSIM plan to solve the exact problems travelers face. Many providers claim to offer “unlimited” data but quietly add restrictions or daily speed limits. Others offer real unlimited data—but at a price that’s too high for most travelers.
That’s why we created BuzzyBee Unlimited—a plan with true unlimited data, no speed cap, full 5G access where available, and a price Malaysians can afford
BuzzyBee’s Japan eSIM gives you great connectivity through KDDI (AU), one of Japan’s most trusted networks. This team-up will give a fast nationwide coverage that lets you stream, navigate, and post content without any buffering. BuzzyBee stands out from others with these features:
- Truly Unlimited Data – No hidden limits or speed reductions
- Nationwide Coverage – From Tokyo’s bustling streets to Kyoto’s serene temples
- Instant Activation – Simply scan a QR code before your flight
- Hotspot/Tethering Support – Share data across multiple devices
- 5G Capability – Access the fastest available networks
Setting up is a breeze. You get a QR code in your email after purchase. Just scan it with your phone, install the eSIM, and you’re ready to go with high-speed internet. No need to hunt for physical SIM cards or deal with language barriers at Japanese mobile shops.
BuzzyBee’s unlimited data policy makes it unique in the market. Most competitors use a Fair Usage Policy (FUP) that gives you only 2-3GB of high-speed data each day before speeds drop to unusable levels.
BuzzyBee’s KDDI-powered plan offers true unlimited high-speed data without any throttling. You can use as much data as you want. Stream videos, upload travel photos, make video calls, and use navigation apps freely without watching your data usage or worrying about sudden slowdowns.
Malaysian traveler used to data restrictions will find this a big step up from typical “unlimited” plans that end up disappointing with hidden limits.
Unlimited Japan eSIM packages suit different travel lengths and data needs:
| Validity | Price (MYR) |
|---|---|
| 4 days | 41.85 |
| 7 days | 67.50 |
| 7 days – Promo | 39 |
| 10 days | 85.50 |
| 15 days | 121.50 |
* Price after 10% New User discount
BuzzyBee’s unlimited eSIM works best for Malaysian who need lots of data. You’ll love it if you:
- Use Google Maps a lot to navigate Japan’s complex transportation system
- Post photos and videos to social media regularly
- Need work connections through video calls or large file transfers
- Share your connection with travel companions through hotspot
- Explore beyond major cities where signals might be weaker
Using your phone as a hotspot makes this eSIM perfect for Malaysian families or groups traveling together. One person can share their unlimited connection with several devices instead of buying multiple eSIMs.
The plan counts each day from midnight to midnight in Japan local time after activation. You get full 24-hour periods unlike some competitors who offer partial days.
Malaysian heading to Japan who want reliable, truly unlimited connectivity will find BuzzyBee the most detailed solution available today.
Travel Booking (Klook)
Malaysian travelers who keep using Klook to book their trips might find the platform’s eSIM offerings a good choice to stay connected in Japan. Klook acts as a reseller and gives access to major Japanese networks at competitive rates, rather than being a dedicated eSIM provider.
Klook’s Unlimited eSIM Japan plan connects you to DOCOMO, one of Japan’s best local networks, which ensures reliable connectivity during your trip. The service has:
- Instant activation within 5 minutes via QR code or directly through Klook’s app
- Hotspot sharing capability that connects multiple devices
- Dual SIM functionality that lets you keep your Malaysian number active
- Wide device compatibility with over 100 different smartphone models
Setting up your eSIM is simple. You’ll get a QR code after purchase that makes setup quick. Your eSIM needs activation within 180 days after booking confirmation. Just make sure both ‘Mobile Data’ and ‘Data Roaming’ settings are on when you land in Japan.
Klook markets several plans as “unlimited,” but they apply a Fair Usage Policy (FUP) that maintains network quality. This policy stops people from misusing network resources. Customer reports show these “unlimited” plans usually have a 1-2GB daily high-speed data cap. Speeds drop to about 384 kbps after reaching this limit.
The reduced speeds still let you:
- Send text messages
- Browse basic text websites
- Use navigation apps (with reduced functionality)
Videos, photo sharing, and data-heavy apps become much harder to use at these slower speeds. This makes Klook’s “unlimited” claim less accurate than providers who offer truly unrestricted data.
Klook’s Unlimited eSIM Japan packages suit different travel lengths and data needs:
| Validity | Price (MYR) |
|---|---|
| 4 days | 36.15 |
| 7 days | 63.30 |
| 10 days | 90.39 |
| 15 days | 135.60 |
Klook Unlimited Japan eSIM show these plans work best for:
- Budget-conscious travelers who want basic connectivity
- Light to moderate data users who mainly check emails, use maps, and message
- Travelers who already use Klook to book other Japan services (accommodations, activities, etc.)
Service quality changes based on location. Some users report smooth video calls throughout Tokyo, while others had connection problems in certain areas despite full signal bars. Airport connections often don’t work well because of signal blocking settings. Wait until you leave the airport before trying to fix any connection issues.
Shopee (eSIM Merchant)
Malaysian travelers love getting their Japan eSIMs from Shopee’s marketplace. The platform’s competitive prices and regular promotions make it a go-to choice. You’ll find plenty of merchants offering ways to stay connected during your Japanese adventure.
Shopee sets itself apart from other eSIM providers. The platform lets multiple merchants sell Japan connectivity options all in one place. Here’s what you’ll find on Shopee:
- Shopee payment system –Most Malaysians already know their way around Shopee. You won’t have to deal with foreign websites or payment systems
- Platform discount codes– The platform runs sales often, with discount codes that cut your costs even more.
Those “unlimited” claims in listings aren’t always what they seem. Most Shopee eSIM merchants use Fair Usage Policies (FUPs) for their Japan plans. They usually cap high-speed data at 2-3GB per day, then slow things down.
The merchant listings drop hints about these limits in their wording:
- “Real Unlimited Package” usually means you get full-speed data with daily limits
- “Unlimited 4G LTE High-speed Data” comes with FUP limits in the fine print
- “Infinite Data” means your speed drops after you hit certain usage marks
Unlimited Japan eSIM packages suit different travel lengths and data needs:
| Validity | Price (MYR) |
|---|---|
| 5 days | 55 |
| 7 days | 70 |
| 8 days | 80 |
| 10 days | 90 |
Shopee is best for travelers who prioritize price and don’t mind doing a bit of homework.
Budget-conscious travelers
Those who are comfortable comparing seller ratings and reviews
Travelers who don’t need premium support but just want a working eSIM at a good price
Telco Data Roaming for Japan (Maxis Unlimited Plan)
Malaysian travelers heading to Japan can stick with their home telco provider Maxis. The service is familiar and gives you uninterrupted connectivity. Let’s get into how Maxis compares to other eSIM providers for your Japanese trip.
Malaysian going to Japan will find several benefits:
- Dual SIM capabilities – Keep your Malaysian number while you use a Japanese data plan
- Multi-country coverage – You can connect in over 100 countries with full Japan coverage
- 5G connectivity – Make use of Japan’s high-speed networks where you can find them
- Scheduled activation – Set up your roaming through the Maxis app before you land
Maxis advertises “unlimited” data but their Fair Usage Policy (FUP) affects heavy users by a lot. The international roaming package gives you 2GB of high-speed data each day before dropping speeds to 1Mbps.
The slower speed still lets you:
- Watch standard definition videos
- Browse social media
- Check email and messages
- Use simple navigation
Malaysian travelers who plan to stream 4K videos or transfer large files in Japan might find this limiting. Maxis sits between providers offering truly unlimited data and those with fixed data caps
Maxis has several roaming options that work well for Japan trips:
| Duration | Price (RM) | Coverage |
|---|---|---|
| 1 Day | 29 | Japan only |
| 7 Days | 69 | Japan + 26 countries |
| 15 Days | 99 | 100+ countries inc. Japan |
| 30 Days | 149 | 100+ countries inc. Japan |
The 30-day multi-country pass recently went up by RM30 from its old price of RM119. Malaysian staying longer in Japan should review if other eSIM providers offer better value
These travelers will find Maxis roaming especially useful in Japan:
- Business travelers – People who need their Malaysian number to stay reachable
- Short-term visitors – Anyone staying less than a week who wants easy setup
- Multi-country tourists – Travelers exploring several Asian destinations
- Light to moderate data users – Those who mainly need data for maps, social media, and some streaming
My experience shows Maxis really helps when you’re visiting multiple Asian countries in one trip. You won’t need different connection setups for each place you visit.
All the same, Japan-specific eSIMs usually give you more value if you’re only visiting Japan, especially if you need unlimited data without speed limits.
Ubigi
Ubigi offers a 7-day unlimited eSIM Japan plan, providing high-speed data on Japan’s top mobile networks. Unlike fixed-data packages, Ubigi’s unlimited plan gives travelers large data allowances with transparent limits
Dual-network coverage – Connects to both KDDI (au) and NTT Docomo, ensuring stable coverage in cities and rural areas.
Multi-device support – Works on smartphones, tablets, and laptops with eSIM capability.
In-app management – Track data usage, monitor active plans, and buy new plans directly in the Ubigi app.
Ubigi’s Unlimited Japan eSIM plan comes with a Fair Usage Policy (FUP). You’ll get 15.36GB of high-speed data during your 7-day trip. Once you reach this limit, the connection will be throttled to 1 Mbps for the rest of the validity period. At 1 Mbps, you can still browse websites, use messaging apps, check emails, and navigate with maps, but streaming HD videos or uploading large files may become slower. This policy allows you to stay connected without worrying about running out of data completely, while managing heavy usage fairly
Ubigi charges more than others for Unlimited eSIM Japan Plan:
| Duration | Price (MYR) |
|---|---|
| 7 days | 94 |
| 30 days | 133 |
Ubigi’s Unlimited eSIM Japan is best for Malaysian travelers who:
Are comfortable with a 15.36GB high-speed limit before throttling
Want dual-network reliability (KDDI + Docomo)
Holafly
Holafly gives Malaysian travelers another way to stay connected during their Japanese trips. This European eSIM company has expanded into Asian markets and calls itself a premium service that’s easy to set up.
The Unlimited eSIM Japan from Holafly runs on the KDDI network and gives reliable coverage across Japan. Here’s what makes their service stand out:
- Trusted international brand – Pay more for peace of mind and global service
- No registration required – Buy without creating accounts
- Keep your Malaysian number active – Works with your physical SIM
Holafly stands out with its “one price, one package” approach. You just pick how long you need it for and don’t worry about data limits. This works well for travelers who want something straightforward without too many choices.
Holafly offers unlimited data on KDDI’s network, but with a Fair Usage Policy (FUP). After heavy usage, speeds may drop to around 512Kbps, and hotspot use is limited to 500MB per day. You can still browse, message, and navigate, but streaming and large uploads may be affected
Holafly charges more than others for Unlimited eSIM Japan Plan:
| Duration | Price (MYR) |
|---|---|
| 5 days | ≈94 |
| 7 days | ≈133 |
| 10 days | ≈168 |
| 15 days | ≈232 |
Holafly is for Malaysian who prefer international brands and a simple, fixed-cost experience—even at a higher price
Unlimited eSIM Japan Plan Lengths Malaysians Usually Choose
Malaysian traveler commonly choose plans based on trip duration. Popular choices include:
7-day plans – standard for most Malaysia-to-Japan trips
10-day plans – for extended travel or public holiday overlaps
15-day plans – for longer vacations or business + leisure stays
Most of the providers mentioned above offer flexible plan durations, usually starting from 7, 10, or 15 days, and going up to 30 or even 90 days depending on your needs. Longer durations generally come with a higher cost
Key Takeaways
For Malaysian travelers heading to Japan, choosing the right unlimited eSIM can make or break your connectivity experience. Here are the essential insights to guide your decision:
BuzzyBee is the only provider in our comparison that delivers true unlimited 5 G data on KDDI (au) with no speed caps or daily limits—ideal for heavy streaming, uploads, and tethering.
Holafly also uses KDDI and advertises unlimited data, but applies a Fair Usage Policy: speeds drop to roughly 512 Kbps after very heavy use, and hotspot sharing is limited to 500 MB per day.
Ubigi calls its plan “unlimited,” yet gives you 15.36 GB of high‑speed data for seven days; after that, speeds are throttled to 1 Mbps—fine for maps and messaging, but not HD video.
Shopee resellers usually have the lowest upfront prices, but quality and support vary. Most listings apply a daily FUP of about 2–3 GB before throttling, so check seller ratings carefully.
Network choice matters: KDDI leads in 5 G speed (over 1 Gbps in tests), while NTT Docomo remains the coverage champion in rural Japan. Pick based on whether you’ll stay mostly in cities (speed) or venture into the countryside (coverage)
The key is to match your data usage with the right provider. If you’re a heavy user—streaming, uploading content, or working remotely—BuzzyBee’s truly unlimited eSIM Japan plan is the best choice. If you’re a light user who mainly checks emails, uses maps, or browses casually, you can save with Klook’s budget-friendly plans or other fixed-data options
Limited Time Promo:
For a short time, BuzzyBee is offering 7 days unlimited eSIM Japan data for just RM39—the same price you’d usually pay for a 2GB plan, but with no speed caps or daily limits.
Claim your promo now on our Facebook page: BuzzyBee.my Facebook
FAQs
Q1. What’s the best unlimited eSIM option for heavy data users in Japan?
BuzzyBee offers truly unlimited data without speed caps on KDDI’s 5G network, making it ideal for heavy data users, content creators, and those needing to share connections across multiple devices.
Q2. Do most “unlimited” eSIMs for Japan actually have data limits?
Yes, most providers implement Fair Usage Policies that throttle speeds after 2-3GB of daily usage. Only a few, like BuzzyBee, offer genuinely unlimited high-speed data without restrictions.
Q3. How do eSIM prices compare between different providers for Japan?
Prices vary significantly. For example, a 15-day plan from BuzzyBee costs around RM121.50, while Holafly charges about RM232 for similar coverage. It’s essential to compare options to find the best value for your needs.
Q4. Which Japanese mobile networks do eSIM providers typically use?
eSIM providers commonly use networks like DOCOMO, KDDI, Rakuten and Softbank. DOCOMO generally offers wider rural coverage, while KDDI tends to provide faster speeds in major cities.
Q5. Are there good eSIM options for light data users visiting Japan?
Providers like Klook, and Shopee (via eSIM merchants) offer fixed-data packages ranging from 1GB to 20GB with no speed throttling. These plans are often more cost-effective for travelers with lighter or predictable data usage