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.

Jun 3, 2025

EscapeSIM

NoBuenoused in Japan

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.

Jun 2, 2025

Gaza Online

JPN Userused in Japan

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?

May 30, 2025

Roamify

Pamused in Japan

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.

May 17, 2025

TravelGator eSIM

Elaine Wused in Japan

Used this eSIM during my trip to Japan — it was smooth, convenient, and worked perfectly the whole time. Definitely a must-have for travelers!

May 13, 2025

iRoamly

Chen Lineused in Japan

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!

May 11, 2025

Supera link

Taritaused in Japan

Quick, easy, affordable

May 9, 2025

Nesa

broused in Japan

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!

Apr 4, 2025

Roamify

TimKused in Japan

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.

Apr 4, 2025

BNESIM

DSused in Japan

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?

Mar 28, 2025

Driffle eSIM

broused in Japan

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.

Mar 22, 2025

Nesa

Bokuused in Japan

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!

Mar 21, 2025

Nesa

Tiffused in Japan

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.

Mar 12, 2025

Always Mobile

Komodowaranused in Japan

Break Out Point is Japan.
You will connect to IIJ (ISP)
You cannot use hotspot

Mar 8, 2025

iRoamly

Françoisused in Japan

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.

Jan 21, 2025

Frequently Asked Questions

How many travel eSIM brands (providers) are available for use in Japan, and how many prepaid data plans are there?

Currently, over 100 travel eSIM brands offer service in Japan, with over 3400 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. It’s important to note that many of these plans may experience speed throttling, and some have speed limits (such as 256kbps with Firsty or 20Mbps with iRoamly). Pricing for these plans generally ranges from approximately $1.00 to $79.00 USD, depending on the validity period and provider.

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: June 5, 2025