Moshi Moshi Japan (Airalo eSIM): Use Your Phone In Japan From US$4.50

Moshi Moshi offers low-cost eSIMs for visitors to Japan. Plans start from US$4.50 (~¥660) and give you 4G coverage from KDDI & Softbank.

If you're planning a trip to Japan, one of the easiest ways to use your cellphone whilst you're there is with a Moshi Moshi eSIM. Named after the telephone greeting that is said in Japan (もしもし), Moshi Moshi offers a low-cost allowance of 4G data in Japan.

You can get a Moshi Moshi eSIM from US$4.50 (approximately ¥660) at Airalo. This will allow you to use your cellphone in Japan for up to 7 days. The Moshi Moshi eSIM is available on a pre-paid basis for visitors to Japan and gives you an allowance of 4G mobile data to use whilst you're there.

In this article, we'll look at the Moshi Moshi service in Japan, including how you're able to get it and the best Moshi Moshi eSIM deals. We'll also look at the coverage available on a Moshi Moshi eSIM, and the other ways of using your mobile phone in Japan (e.g. through international roaming).

Plans From:	US$4.50 (~¥660) for 7 days
Best Deals:	1GB data for US$4.50 (valid for 7 days) 3GB data for US$8.50 (valid for 30 days) 10GB data for US$18 (valid for 30 days)
Compatible Devices:	Apple iPhone 11 and newer Samsung Galaxy S20 and newer Google Pixel 3 and newer see more...
Coverage:	4G coverage (KDDI & Softbank)
Voucher Code:	Save 10% on all Moshi Moshi eSIMs using KEN10 (new customers only) Save 5% using the KEN5 voucher code (existing Airalo customers)

Moshi Moshi Plans

If you're looking for an affordable way to use your cellphone when travelling in Japan, you can get a Moshi Moshi eSIM from only US$4.50 (approximately ¥660) for 7 days usage.

To get a Moshi Moshi eSIM, you'll need to have an eSIM-compatible device such as the iPhone 11, Galaxy S20, Pixel 3 or later devices. You can then order your Moshi Moshi eSIM through the Airalo app with instant delivery direct to your phone. There's no need to queue at the airport or to register the Moshi Moshi eSIM with your ID, saving you lots of time.

The following table shows the eSIM plans that are currently available from Moshi Moshi in Japan:

Plan	Data	Plan Cost
Data-only eSIM No calls included	1GB data	US$4.50 (approx ¥660) 7 days validity	See deal
Data-only eSIM No calls included	2GB data	US$6.50 (approx ¥960) 15 days validity	See deal
Data-only eSIM No calls included	3GB data	US$8.50 (approx ¥1,250) 30 days validity	See deal
Data-only eSIM No calls included	5GB data	US$11.50 (approx ¥1,700) 30 days validity	See deal
Data-only eSIM No calls included	10GB data	US$18.00 (approx ¥2,660) 30 days validity	See deal
Data-only eSIM No calls included	20GB data	US$26.00 (approx ¥3,840) 30 days validity	See deal

As a special offer for May 2025, you can get a 10% discount on all Moshi Moshi eSIMs. Simply enter the KEN10 voucher code at checkout. This offer is only available if you're new to Airalo.

If you've already used an Airalo eSIM in the past, you can use the KEN5 voucher code to get a 5% discount on your plan.

See all Moshi Moshi eSIM deals →

Once you've ordered your Moshi Moshi eSIM, it will only activate when your cellphone actually connects to a supported network in Japan. This means the validity period will only begin when you actually land in Japan and turn your cellphone on.

Your Moshi Moshi eSIM works with the dual-SIM function on most modern smartphones. This means you can use your regular SIM card alongside the Moshi Moshi eSIM (e.g. to receive incoming phone calls and text messages on your normal phone number).

Alternatives to Moshi Moshi

The main disadvantage of Moshi Moshi is the fact you're getting a data-only service on the eSIM. You will not get a local phone number in Japan when you're using the Moshi Moshi eSIM in your phone.

If you'd like to call or text whilst you're travelling in Japan, you'll need to use your normal SIM card instead (on which international roaming fees may apply). Alternatively, you can side-step these charges by making your calls through WhatsApp or other similar apps.

If you're looking for a more fully featured SIM card with a local phone number in Japan (starting with +81), you could consider getting a regular prepaid SIM card upon arrival instead. This will involve some additional hassle (e.g. queuing up at the airport to get your SIM card, a registration process for the SIM card, etc) but it can be preferable and better suited for longer-term use in Japan.

Moshi Moshi Coverage

If you're using a Moshi Moshi eSIM, you'll have access to 4G mobile coverage in Japan. This is provided by the following partner networks:

Coverage Provider	Network Type	Coverage Area
KDDI	4G LTE	Japan
Softbank	4G LTE	Japan

There's no international roaming available on a Moshi Moshi eSIM. Therefore, you won't be able to use it outside of Japan. If you're planning to visit multiple countries on your trip, you may need to get a separate eSIM for the other countries you visit.

Other Airalo eSIMs

Airalo's Moshi Moshi eSIM can only be used in Japan.

If you're planning to visit multiple countries on your trip, you could consider getting a Asialink or Discover eSIM. These eSIM plans will work in Japan, as well as a number of other countries.

Asialink eSIM

Airalo's Asialink eSIM will also work in Japan, giving you 4G coverage from KDDI. In addition, you'll be able to use it in 17 other countries. The Asialink plans start from US$5 for 1GB of data:

Plan	Data	Plan Cost
Data-only eSIM No calls included	1GB data	US$5.00 7 days validity	See deal
Data-only eSIM No calls included	2GB data	US$9.50 15 days validity	See deal
Data-only eSIM No calls included	3GB data	US$13.00 30 days validity	See deal
Data-only eSIM No calls included	5GB data	US$20.00 30 days validity	See deal
Data-only eSIM No calls included	10GB data	US$37.00 30 days validity	See deal
Data-only eSIM No calls included	20GB data	US$49.00 30 days validity	See deal
Data-only eSIM No calls included	50GB data	US$100.00 90 days validity	See deal
Data-only eSIM No calls included	100GB data	US$185.00 180 days validity	See deal

Discover eSIM

Airalo's Discover eSIM will also work in Japan, giving you 4G & 5G coverage from Rakuten, SoftBank & KDDI. In addition, you'll be able to use it in 123 other countries. The Discover plans start from US$9 for 1GB of data:

Plan	Data	Plan Cost
Data-only eSIM No calls included	1GB data	US$9.00 7 days validity	See deal
Data-only eSIM No calls included	2GB data	US$17.00 15 days validity	See deal
Data-only eSIM No calls included	3GB data	US$24.00 30 days validity	See deal
Data-only eSIM No calls included	5GB data	US$35.00 60 days validity	See deal
Data-only eSIM No calls included	10GB data	US$59.00 180 days validity	See deal
Data-only eSIM No calls included	20GB data	US$69.00 365 days validity	See deal

Discover+ eSIM

The Discover+ eSIM works in a very similar way to the Discover eSIM, also allowing you to use your mobile phone in Japan. However, it adds the ability for you to make and recieve phone calls and SMS text messages on your eSIM. You'll be assigned a +43 phone number (based in Austria) to use for calling and texting.

The Discover+ plans currently start from US$15 for 10 minutes, 10 texts and 1GB of data:

Plan	Data	Plan Cost
10 mins 10 texts	1GB data	US$15.00 7 days validity	See deal
20 mins 20 texts	2GB data	US$27.00 15 days validity	See deal
30 mins 30 texts	3GB data	US$36.00 30 days validity	See deal
50 mins 50 texts	5GB data	US$50.00 60 days validity	See deal
100 mins 100 texts	10GB data	US$79.00 180 days validity	See deal
200 mins 200 texts	20GB data	US$89.00 365 days validity	See deal

Other Country Specific eSIMs

You can also buy other country-specific eSIMs from Airalo, including the following:

• Yes! Go! (Australia)
• Joia (Brazil)
• Tuque Mobile (Canada)
• Chinacom (China)
• Bonbon Mobile (France)
• Hallo! Mobil (Germany)
• Hkmobile (Hong Kong)
• Indicomm (India)
• Indotel (Indonesia)
• Mamma Mia (Italy)
• Chorro Fon (Mexico)
• Choukran (Morocco)
• Fofo Mobil (Portugal)
• CellSA (South Africa)
• Guay Mobile (Spain)
• Merhaba (Turkey)
• Burj Mobile (United Arab Emirates)
• Uki Mobile (United Kingdom)
• Change Mobile (United States)
• Xin Chao (Vietnam)

For more information, read our Airalo review.

More Information

For more information about Moshi Moshi, please see the Airalo website.