Prepaid Japan SIM in Card : Prices and Where to Buy?

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You are traveling to Japan, a nation with more than 6,800 islands, and you will need Google Maps, search for that sushi restaurant or find your reservations. For all this, you need a SIM card to have an internet connection when you land in Japan. As you know, you can find a variety of options but which one to choose?

Remember that using roaming with your operator will cost you an arm and a leg: up to 15€ per MB downloaded. Unthinkable! So then, which card should you buy? If you want to know which is the best data SIM card for Japan and remain connected to the internet, we talk about the best alternatives: advantages and disadvantages, where to buy them, and some travel tips to keep in mind.

You can also keep your local line with a digital eSIM for Japan if you have a compatible cell phone like iPhone XR or newer. They work very well!

esim japan
  • High speed connection without surprise bills.
  • Receive your QR code immediately.
  • Connect to the best network.
  • Forget about roaming and searching for WiFi.
  • Keep your WhatsApp number.
  • Easy to set up: you’ll receive an email with your eSIM in seconds, no matter where you are.
  • Get 5% OFF. Code: roaming5

Why buy a prepaid SIM card for Japan?

There are different options, such as international roaming with your operator or pocket WiFi, with the advantage of sharing data, for example. However, it can be much more expensive. The pocket WiFi is a somewhat cumbersome and expensive device, even more so in case of damage or loss. On the other hand, using data roaming in Japan can be an unpleasant surprise when you return from your trip and see the bill. We have reviewed the prices of the main operators, and this is how much roaming costs in Japan:

  • AT&T: 2,05 USD/MB.
  • T-Mobile: 15USD/MB.

Where to buy the best data SIM card for Japan?

Where to buy the best SIM card for Japan? You have two options, one take it with you from your country of origin or buy it when you arrive in Japan. The question is which option is more comfortable and convenient, keep in mind that it is a new country, you don’t speak the language, and you will be tired.

Buying a prepaid SIM card for Japan from an online store

As I said before, there are international SIM card options for Japan that you can get before traveling. But why is it recommended? It makes things much easier when you arrive, think of everything that happens after arriving, you have to go get your suitcase, go through security and so on. The last thing you want is to add stress or complication to the situation, so it is better to have it beforehand. You just need to arrive, insert and configure your SIM card, and that’s it, you’re a connected digital nomad.

holafly sim card asia
Asia SIM Card

Holafly SIM Card

Holyfly offers the best data SIM card in Japan with network support from two of the best mobile operators, Softbank and NTT Docomo. Available in five plans:

Days and data plansPrice
7 days -1.5GB of data22 USD
8 days – unlimited data39 USD
15 days – unlimited data50 USD
20 days – unlimited data79 USD
30 days – unlimited data85 USD
Holafly SIM Card data plans. Source: Holafly


  • If you lose the SIM card, you do not have to pay any penalty.
  • The delivery period lasts a maximum of 48 hours (two days), and delivery to your home is free.
  • Unlimited data plans.
  • They have express and express delivery option if you are short of time.
  • You can share data with other devices.
  • Softbank and NTT Docomo network coverage.
  • Easy installation by inserting it into your cellphone when you arrive in Japan.
  • 24/7 customer support.


  • Please note that the 7-day SIM card only gives you 1.5 GB of mobile data. But, if you need more data, you can take the 8-day SIM card.

Econnect prepaid SIM

It offers you a card with six types of plans, all with NTT Docomo coverage: 100MB per day for 7, 15, and 30 days at 26 USD, 500MB for seven days at 19 USD, 1GB for 15 days at 31 USD, 3GB for 30 days at 48 USD, 5GB for 30 days at 67 USD, and 10GB for 60 days at 90 USD.


  • No shipping cost.
  • You can manage the card from the platform’s App.


  • The delivery period can be extended up to 2 weeks.
  • Only operates with NTT Docomo, which may affect your coverage when traveling around the country.
Selfie of two friends in Japan
Take your cell phone with internet to upload your photos to social networks. Source: cottonbro on Pexels.
Using your mobile with SIM card to Japan
Don’t forget your cell phone and SIM card. Source: on Pexels.

Japan Mobal SIM card

This company operates with Softbank and offers cards for stays of 8, 16, 31, and other options. Their prices start at 34.19€. Their long-term cards, more than 90 days, can charge you up to 3 fees.


  • Their call per minute and SMS rates are reasonable.
  • It operates with Softbank, an operator with good coverage in many places, although there may be inadequate coverage in some areas.


  • Not cheap.

Prices of SIM cards for Japan

Now that you know each option for prepaid SIM cards for Japan in detail, it would be convenient to know their advantages and disadvantages in a table comparison for you to decide which one is the best. Well, here we show it to you.

In the case of Holafly and Mobal, which offer unlimited data, minimum consumption of 1 GB per day and a 15-day stay in Japan has been considered.

Data costAmount of dataCost per dayCost per GB
Holafly50 USDUnlimited for 15 days3,3 USDUnlimited
Econnect49 USD1 GB for 15 days2,1 USD49 USD
Mobal62 USD7,5 GB3,5 USD8,3 USD
Prepaid SIM price comparison for Japan for a 15-day stay (Holafly, Econnect, and Mobal).

Buying a SIM card in Japan with Docomo, Softbank and COMST

You can buy it in electronic stores (Yodobashi Camera, Sofmap, and Biccamera), stands at airports, bus terminals, train stations, tourist information centers, convenience stores, and travel agencies.

Please note that prices vary according to where you buy. There may be variations, and it will take a little paperwork to get it upon arrival. The most important operators NTT Docomo, Comst, Softbank. Although we could also consider Rakuten Mobile, Smash Mobile, or B-mobile.

NTT Docomo

Considered one of the country’s largest operators, it has good 3G and 4G coverage throughout Japan. This card can be purchased and topped up in supermarkets, authorized stores (Familymart, PlatPlat), and vending machines.

There are two types of cards: one that lasts seven days and offers 100MB of data per day, priced at 27 USD, and another one that lasts 14 days and also provides 100MB of data per day at 34 USD.


  • These data SIM cards can work on cell phones, tablets, and pocket WiFi.
  • To activate the data SIM card, you can access a menu in Japanese or English.
  • SIM prices range from 29 to 35 USD.


  • You must show your passport and fill out a form to complete the transaction.
  • There are only two plans.
  • It offers 100MB of data per day (very little).


This operator, supported by the NTT Docomo network, also offers Internet at 3G and 4G speeds. Its SIM cards, called T-SIMs, can be purchased and loaded in different parts of the country.

It has two exclusive plans for tourists, a 30-day plan that offers 3GB of data and costs 33,2 USD, and a 7-day plan that offers 1GB of data at 47 USD. Regarding credit, there are three plans, all for 30 days: 3GB at 19 USD, 5GB at 30 USD, and 10GB at 48 USD.


  • It has four plans that can provide up to 10GB of data for up to 1 month (30 days).
  • The prices of its plans cost between 32 to 48 USD.
  • Data cards can be topped up with credit.


  • There are no plans other than seven days and 30 days.
  • If you buy credit and spend the MB before, you will have to wait a whole month to reload.


The SIM card will cost you 131 USD, while if you want to add call credit, it will cost you another 88 USD, both will last you 14 days. You can get them and top them up in supermarkets and authorized stores.

Softbank offers three recharge plans: One that lasts two days and offers 200MB at 8 USD, another one of seven days and offers 700MB at 24 USD, and the last one, of 30 days, which offers 3GB at 44 USD.


  • The best option if you consider buying data and calls.
  • There is an exclusive promotion for tourists called Tourist SIM, and it gives you 1GB of 3G and 4G data for 31 days.
  • Buying a SIM card gives you access to 400 thousand free exclusive WiFi hotspots for Softbank customers.


  • The data offered by the top-up plans only amounts to 3G.
  • You will have to wait 14 days to recharge your Japan SIM card in case you have used up your first MB.
  • You will have to show your passport and fill out a form to purchase the product.

An alternative that charges you the lowest possible cost in data (GB) and per day is without objection Holafly’s Japan SIM card, the best alternative to have Internet on your trip.

Looking up at a skyscraper in Japan
The GPS will help you find the places you want to see. Source: Ryutaro Tsukata on Pexels
Bring your cell phone and SIM card for Japan
Don’t miss the cell phone with internet in Japan. Source: Keira Burton on Pexels.

The Best Japan SIM card, which one to buy?

The answer is Holafly’s Japan data SIM card, which offers unlimited data starting at €34 for more than a week’s stay up to a whole month. With unlimited data and network coverage from Softbank and Docomo, you can share cellular data like a pocket WiFi.

There are five types of cards: 7 days with 1.5 GB at 23 USD days with unlimited data at 40 USD, 15 days with unlimited data at 51 USD, 20 days with unlimited data at 80 USD, and 30 days with unlimited data at 86 USD.

Remember your advantages. Unlimited data. 24-hour customer service available, free shipping to your home, excellent coverage of Softbank and NTT Docomo operators, and you can share data with other devices (as do the pocket WiFi or portable WiFi) and keep your WhatsApp number, so you do not lose your contacts.

Will my phone work on Japanese networks?

Always keep this in mind, especially if your device is not quite modern, check if your cellphone will work in Japan and avoid headaches. On the Kimovil website, you can check whether or not your phone will work in Japan. Enter the brand and series of your device and check if it will operate in Japan, with which frequency bands according to the coverage and sub-brand of your product.

In which bands do cellular carriers work in Japan?

Please note that this compatibility will also depend on the operator offering the service. However, Softbank and NTT Docomo have the best compatibility with our mobile phones.

B1 (2100); B8 (900); B9 (1800 Japón); B11 (1500); B19 (800)
4GB1 (2100); B3 (1800); B8 (900); B9 (1800); B11 
(1500); B18 (800); B19 (800); B21 (1500); B28 (700); B41  (TDD 2500); B42 (TDD 3500)
n77 (3700); n78 (3500); n257 mm Wave (28 GHz)
Each operator works with various bands. You can check it on the Kimovil website.
All set to stay connected to the Internet in Japan!

Frequently asked questions about the Internet and SIM card for Japan

How good is coverage of the best SIM card in Japan?

It is very good in general all over Japan. However, in very mountainous and rural areas, it can become a bit more limited.

How long can I use the Japan SIM card?

It depends on the SIM you buy, but you can find SIMs for just one week, 8, 15, 20, and even 30 days. With limited and unlimited data, it will depend on your travel needs.

Will I be able to use the best Japan SIM card in other countries?

Normally in the case of this card, it only works in Japan. If you need a SIM card for another country, you would have to purchase a new SIM card.

Can I receive messages or calls on the Japan SIM card?

It depends. The Holafly Japan SIM card does not include a local phone number, so it is impossible to receive calls and messages. However, you can work around this through social media, and that’s it! Super simple.

Do I have to return the data SIM card for Japan?

No, you don’t. Once you have used your SIM card, you can throw it away. It will not be necessary to return it as it will be unusable once you have used up the data for the days you bought it.

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