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Possible Throttling Possible Throttling Low latency Unfiltered customer reviews
The first time I used an international eSIM from this website with this company, I had no problems at all. I generally got 5G, and I was even in small towns in Japan—I honestly didn’t expect it to work that well.
I highly recommend it. To avoid any issues, and since it was 20GB, I disabled several apps so they wouldn’t use data in the background. By the way, I was also sharing it with my wife.
Everything was perfect.
I expect that in 2025 any LTE services to be "usable". This is barely useful for my expectation.
Social media is slow, gaming is slow, I trusted esimdb's low latency tag and have to say I am disappointed.
Tested location: Narita airport.
I should have went with Nesa+ and not cheap out the couple of dollars.
Not that fast but okay-ish speeds in Japan on the KDDI (au) network. However, the biggest drawback is that this eSIM routes through Hong Kong (HK IP address), so ChatGPT doesn’t work which is a real shame.
I used the Global eSIM 1GB with a coupon for use within Japan.
It worked very smoothly.
When I went to Hakone where the signal tends to be weak, it stayed connected by switching between SoftBank and KDDI depending on the location.
I think it’s good to keep one as a backup in case of network outages.
The IP address will be from overseas so be careful with Japan-only services.
I tried ordering the FREE plan and set it up on my iPhone SE2.
At first, the eSIM activation stayed in “processing on the server” status for about 10 minutes without any response, so I just left it for a while until it finally completed.
After that, the phone stayed out of service and couldn’t connect to the network for over an hour. I had almost given up, but eventually, it just started working on its own.
In terms of speed, there were no issues.
While using the service, I kept checking the data usage on the website, but after reaching 0.01GB, the connection stopped working completely. I thought maybe the usage display was just delayed, but even the next day, it hadn’t updated. It felt like I had used more data than what was shown, so the website’s usage display doesn’t seem very reliable.
Bought a plan and nowhere in the checkout process was 4G only mentioned. Contacted support and they cancelled the plan as requested but they also pettily banned my account.
Connectivity and speeds were spotty in Osaka and Kyoto. eSIM did NOT support hotspot sharing. Would not buy an eSIM from this provider again.
It didnt connect ntt docomo. It connects iij and its around 5 mbps, too slow..
As the other reviewer mentioned setup was a bit tedious with having to manually configure a connection on android. but it worked perfectly as soon as I landed in Japan. 50GB for €22 was a great deal for my 3 weeks Japan.
Hotspot worked also and I had good data connection all around Tokyo, Kyoto and Osaka.
Just to make others aware. attached is a sample of the setup process that has to be followed, it seems daunting at first but it was easy enough to setup.
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.
Frequently Asked Questions
How many travel eSIM brands (providers) are available for use in Japan, and how many prepaid data plans are there?
Japan offers more than 110 travel eSIM providers and over 4,100 prepaid data plans, giving travelers a wide variety of options to choose the plan that best fits their needs.
Are there any unlimited data eSIM plans available for Japan?
Unlimited data eSIM plans for Japan can be found with several providers. Japan Wireless eSIM, for example, offers an unlimited data package valid for 3 to 6 days with prices between 19.00 and 29.00 USD. Other providers that sell unlimited plans covering Japan include Firsty, Yoho Mobile, abesteSIM, MicroEsim, iRoamly, Roamify, Truely, esimzon, Billion Connect, Yesim, Airhub, and ByteSIM, with prices ranging from free up to about 35.50 USD. Most of these unlimited offers include throttling; Firsty restricts speed to 256 kbps, Yoho Mobile, abesteSIM, MicroEsim, Roamify, and Yesim limit speeds to around 5 Mbps, while iRoamly allows up to 20 Mbps before possible slowdown. Travelers should estimate their data usage and consider how speed throttling may affect their experience when choosing a plan.
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.