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I’ve used Billion Connect for multiple eSims abroad now, and I’ve found them great every time. Their customer service responds pretty quickly to any issues, and the sims are cheap and work well. Be aware the sims are mostly based in Hong Kong so if you’re geographically far from there the latency might be a little high, and you may need a VPN for things like TikTok to work, but I’ve had very few issues.
Do not buy the Clearance esim. It's not mentioned on the website, but it's routed through Hong Kong. The connection is very bad and 5G seems capped at slow speeds. I had issues keeping a consistent connection and ended up buying a MobiMatter esim that has worked flawlessly.
The product claimed to support multiple carriers, so I decided to try out the "eSIM, 3GB, 30 Days, Japan" for use in Japan.
It seems the APN "vmobile.jp" (iij) can be used, but... is this really multi-carrier?
Used without issues in both Tokyo and Osaka. The latency wasn't great due to roaming connection through Singapore, but was manageable. At least it’s more convenient than eSIMs that go through Hong Kong and don’t work with services like ChatGPT. The network was au’s LTE or 5G, and signal was solid everywhere, no complaints.
Used this eSIM during my trip to Japan — it was smooth, convenient, and worked perfectly the whole time. Definitely a must-have for travelers!
The internet worked perfectly everywhere – airports , even on road trips. No annoying "loading..." screens! Plus their customer chat is LEGIT. Messaged them at 1AM (jetlag lol) and replied in 2 minutes. She literally stayed on chat while I set it up, double-checked everything. Way cheaper than my phone plan back home. Never going back to regular SIM cards!
Price was very good, installation was easy and everything worked after setting up the APN. Speed was also good (see speedtest image).
The network showed as "IIJ" which operates on the NTT docomo network. It had coverage almost everywhere except once for about 5 minutes, no big deal.
Top-up was easy but only possible in the app, not the website.
Would definitely recommend and use again!
coverage was very good, easy setup at public wifi spot upon arrival. One major thing though: internet breakout is Hong Kong.
There is no instagram coverage (anymore) in Hong Kong!
If you plan to use this operator, you should be aware of this.
Doesn't work! Waste of money! I was only able to see if it works after arriving in Japan in March '25, but I never got connected when automatic carrier selection is on. I chatted with the BNESIM support and was told to select KDDI manually. After that I was able to get connected, for no more than 2 mins each time in a series of unsuccessful attempts. I then chatted with the support again. This time they said this case will be escalated to the advanced team and I'd be hearing from them within 24 hrs. Yes, you're right! The never responded to me afterwards! Sadly speaking, this is the second time I run into the same situation with them. I bought another esim in 10 mins from EIOTCLUB and I got continuous, stable connection ever since. So which one is the scam?
Installation was easy, price was okay. Coverage and speed were good.
However, the website said it would connect to all networks (docomo, KDDI, SoftBank, Rakuten) but only KDDI worked for me.
The usage display only updated every 5 days (not ideal). Top-up was not possible.
Overall an okay experience.
As a proper Naija person wey no like wahala, I carry Nesa Mobile enter Japan and I must say e work like magic! From Tokyo to Osaka, network dey steady. No need to dey look for WiFi or disturb anybody for hotspot.
Activation na breeze I just scan small QR code, and boom, my phone don dey browse like say I never comot Naija.
Sometimes the speed go slow small, especially for some areas or inside train, but other times e dey fast well enough to browse, chat, even use map when I waka lost (no shame, e happen).
One thing I gatz salute dem for na customer support. When I get small issue, I message them and dem respond quick quick. No long story. Thanks Omar!
Infuriatingly slow even though eSIMDB customer service said low latency would feel snappier than 5G options. Couldn’t even use Google Translate image translation, and Google Maps takes significantly longer to load any given place’s details. Wouldn’t recommend or use again.
Break Out Point is Japan.
You will connect to IIJ (ISP)
You cannot use hotspot
I used their unlimited 3-day plan and could use more than 20GB of data, so it seems to be indeed unlimited. However, the speed was capped at 10 Mbps the whole time.
Traffic was routed through Hong Kong, so the latency was not great but not too bad.
The issue with a Hong Kong IP is that I couldn't access some services like ChatGPT.
Very good experience. I had a consistent connection during all my stay. The speed was good, and the latency was low thanks to the internet breakouts being in Japan.
The hotspot is working after setting up the APN as documented in their guide.
The price is pretty good given the good speed and low latency.
The price is a bit high but the network worked perfectly and the speeds were good. Also the app they have works very well.
The price is good and the speed is fine but in my case I suffered from several outages of even a few hours without service which can be a very negative factor.
My first time using a cheep esim provider. Thought I would get scammed, but that was not the case! Gave me all ten gigabytes I bought! Around the first 5GB I used, data stopped working. I than proceeded to follow there instructions on setting the apn settings to the right value and was able to continue using data. Wish they told me to do this right after I installed the esim.
The internet was extremely slow on almost all websites except YouTube. I got the 50€ unlimited package. I don't recommend at all
It worked well, no trouble setting up. Speed was comfortable, had no issues with this. But unfortunately, unlike advertised tethering was not possible.
DO NOT BUY AN ESIM FROM THIS COMPANY
The internet speed is 0.01Mbps, i am not kidding. I am in the middle of tokyo.
Had some trouble setting this up at first. The eSIM supports many of the major networks in japan (KDDI, NTT Docomo, SoftBank) and I had to manually force it to connect to Docomo before it would work.
On android: Settings -> Connections -> Mobile Networks -> Network Operators -> disable "select automatically"
After that, it worked flawlessly.
Used the 20GB, then the unlimited plan 5 day plan when I ran out. Both worked great.
Didn't work. Support couldn't help and stopped to answer after I requested a refund.
Much better than I expected for a travel eSIM. The Japan eSIM I bought from Airalo wasn't the cheapest, but latency was surprisingly good (below 40ms) even though the IP address was from USA, which probably means they are doing a local breakout. The speeds were good, more than sufficient for travel needs, and the coverage was also satisfactory.
It would have been the perfect option if the price were cheaper.
Great experience. Got the eSIM in a sale. Activated while still at home, immediately got connection after deactivation of air plane mode. Speed was good, coverage OK. One downside: location was sometimes detected as Singapore, which was not always great (Microsoft send me a lot of warnings because it was routed through SingTel Mobile in Singapore).
I didn't buy it in the end since the price with a discount was zero, but when clicking the activation button, it was asking for a 0.5 EUR payment with no description for the purpose of that extra hidden cost.
There are days without data and only have LTE speed not 4G in any case. It's true that its cheap but there are better options that have more quality
Used eSIM4Travel for a 2-week stay in Japan. Easy purchase, simple installation, and worked fine with a Hong Kong IP. Good price and decent latency. Connected to SoftBank 5G, not super fast but okay (sufficient). Recommend.
I tested Ubigi (5G) and TravelKon (Docomo IIJ) (LTE only).
Both have Japan IP address.
But TravelKon is faster ping (45ms) instead of Ubigi (120ms) even on 5G.
TravelKon (Docomo IIJ) is recommended.
I'm not sure if I was doing something wrong, but I couldn't use it with my Pixel 5a after making an in-app purchase.
I observed a brief connection to the KDDI network when manually selected the network, but it was immediately disconnected or blocked, showing some instability.
I noticed that "Japan" was not listed under the supported 4G networks in the FAQ so I tried manually connecting to 3G, but both docomo and SoftBank were blocked. I've confirmed that I followed the necessary steps, such as turning on roaming, after reading the FAQ.
However, I found the initiatives within the app, like the NFT tokens YOYO$ that accumulate during app usage for discounts, or the app live streaming, to be very interesting.
Was very happy with service. 5G phone connected at 5G. One of the few options in Japan that will do that. Most roaming services won't and a lot of other prepaid providers won't.
Service was 4G rather than 5G but speeds were perfectly fine, even for real-time navigation. The few low numbers recorded in speed tests were almost all at Narita Airport.
10 GB each turned out to be plenty for 9 days in Tokyo. We did connect our phones to the hotel's WiFi but probably didn't need to.
I purchased the "Unlimited" 30-day plan, It turned out to be misleading. Once I exceeded 1GB of data usage in a day, the speed throttled down to 250-500Kbps.
There isn't any clear mention of this limit.
The latency remains relatively low since the internet breakout is located in Singapore.
~1GB per day at full speed for 50EUR is very expensive, I wouldn't recommend this plan.
The purchase/installation was straightforward.
Very slow even with excellent signal strength (4G, iPhone XS), unusable even for maps and messaging. Very high ping times (600ms+). Support is very slow as well and did not fix the issue nor provide a refund.
Works great! Good coverage (docomo network it seems), Japanese IP, and good ping times to Europe. Used with an iPhone XS on LTE. Attached Speedtest is from a train
Extremely poor support that doesn’t respond to any help after 24 hours.
Paid and activated the sim but couldn’t get any internet connection (despite successfully connected to SoftBank 3G).
I’ve checked many times that apn and roaming is enabled. And re started my phone multiple times.
Issue was never resolved and Airalo support was non existent.
Showing not active all the time, can’t use map, checked settings, trouble shooting, everything is fine, three people bought, nobody’s eSIM works
I purchased AirHub Japan for a 30-day period, although I ended up traveling for less than 30 days but more than 7 days. However, when I turned on the line, I didn't receive any data. I contacted AirHub support via email and received a response within half a day. The support team listed everything I needed to do, except for turning on roaming, which I had overlooked. Once I turned on roaming, I was able to get data in Tokyo. AirHub support also inquired about my destinations in Japan outside of Tokyo. Despite traveling to very remote areas, I was able to get a connection with no issues, and the AirHub support team continuously followed up with me via email for several days. As a low-tech person, I appreciated the excellent level of support I received, and I'm grateful that AirHub eSIM worked so well in Japan. I hope that AirHub will continue to perform well in other countries. Thank you, AirHub, for the great service!
Horrible speed across the entirety of Japan, feels lile youre locked in 2G/Edge. Tried multiple reboots, changed speed profile, tried different networks, it all is of an incredible poor quality. Not worth your money. Switched to another leading eSim provider, night and day! I now can finally browse.
This is my second time using Airalo in Japan. It works okay but it seems the carrier switching doesn't work perfectly. When that happens I just have to turn on -> off flight mode which is a bit annoying but not too big of a deal.
It connected to au (KDDI) 4G most of the time, occasionally docomo (NTT).
The speed is decent but it's roaming via Singapore so there is a certain latency for sure.
The screenshot attached is the one I did at Narita airport.
Bought an eSim ASIA with Airalo and find on 1 day before departure that Japan is no longer part of the 13 country that the eSim cover when I purchase it (now 12 - Japan has been removed).
No email or any type of warning from Airalo and not able to find support. Check how you get support before you buy anything.
Airalo APP is really great, but service is very poor.
In Japan when it connects it's very fast on DOCOMO, often it cannot connect to KDDI (when it does, it's fast too). The big issue with Airalo for me, on a Pixel 6a and Pixel 4a is availability.
In all 3 countries (Eurolink, Asialink, Japan, Turkey cards) I frequently loose connectivity and have no signal even after restarting the phone (even in central train stations, airport, etc).
Japan and Asia cards are going via SingTel Singapore (but I have a Singtell card and the experience is better than Airalo).
Turkey card goes through OVH france, Netflix doesn't work.
Eurolink, only 3G in Georgia so couldn't connect 99% of the time. When it did, it was extremely slow that even whatsapp not going through easily.
Two different phones, both Pixel phones though.
Frequently Asked Questions
How many travel eSIM brands (providers) are available for use in Japan, and how many prepaid data plans are there?
Currently, there are over 100 travel eSIM brands offering service in Japan, with a selection of over 3600 prepaid data plans available. This represents a wide variety of options, making it easy for travelers to find an eSIM that suits their needs.
Are there any unlimited data eSIM plans available for Japan?
Several providers offer unlimited data eSIM plans for Japan, including Firsty, Yoho Mobile, MicroEsim, Billion Connect, iRoamly, Roamify, Truely, esimzon, Yesim, Airhub, ByteSIM, Japan Wireless eSIM, ETravelSim, and MTX Connect. These plans generally range from approximately $0.00 to $79.00 USD depending on the validity period and provider. It’s important to note that most of these plans may experience speed throttling, and some have speed limits, such as 256kbps with Firsty or 20Mbps with iRoamly.
What are the major mobile networks available for a travel eSIM in Japan?
Japan's mobile network infrastructure is primarily supported by the following major Mobile Network Operators (MNOs):
NTT Docomo: Japan's largest telecommunications operator, known for its extensive coverage area and high-quality network.
KDDI (au): The second-largest telecommunications provider in Japan, offering extensive coverage with a focus on strong connectivity in urban areas.
SoftBank: One of Japan's most innovative telecommunications companies, providing excellent network quality in urban areas and expanding its 5G coverage.
Rakuten Mobile: The newest major operator, launched by Rakuten, Inc. in 2018, known for its affordable and innovative pricing models with 5G coverage.
In addition to these MNOs, Japan has several Mobile Virtual Network Operators (MVNOs) that offer mobile services by leasing access from major carriers. Notable MVNOs include:
UQ Mobile: A subsidiary of KDDI Corporation, primarily offering mobile data services.
IIJmio: Leverages Docomo’s network and focuses on high-speed data plans.
It's important to note that most travel eSIMs rely on MNO infrastructure, not MVNOs.
Summarized by Gen AI. Last updated:
All eSIM providers available in Japan
data plans for the provider(s) with this icon are programmatically fetched and updated.