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

WG JAPAN eSIM

Nicoused in Japan

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.

Jan 21, 2025

Airalo

KitanoKenused in Japan

The price is a bit high but the network worked perfectly and the speeds were good. Also the app they have works very well.

Dec 29, 2024

GLOBAL YO

KitanoKenused in Japan

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.

Dec 29, 2024

Yesim

Kamaritimeused in Japan

All is nice

Dec 25, 2024

GLOBAL YO

Vicused in Japan

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.

Dec 23, 2024

Yesim

Alexandrused in Japan

All is nice

Dec 13, 2024

MTX Connect

Nivused in Japan

The internet was extremely slow on almost all websites except YouTube. I got the 50€ unlimited package. I don't recommend at all

Nov 30, 2024

Frequently Asked Questions

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.

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

Currently, there are over 90 travel eSIM brands offering service in Japan, with a selection of over 3000 prepaid data plans available. This represents a wide variety of options, making it easy for travelers to find an eSIM that suits their specific data needs and travel duration.

Summarized by Gen AI. Last updated: April 25, 2025