Y!mobile
  • Service Guide
  • Shop Location
  • FAQ

Prices include tax unless otherwise noted.
Owing to consumption tax calculation, prices may differ from the invoiced amount.

Advantages of being with Y!mobile

Y!mobile Shops On Military Bases in Japan  with English Speaking Crew ! Y!mobile Shops On Military Bases in Japan  with English Speaking Crew !

Shops On Military Bases in Japan, with English Speaking Crew!

Use your Own phone or purchase a New Smartphone Use your Own phone or purchase a New Smartphone

Use your Own phone or purchase a New Smartphone,
eSIM service is available

Why Get a local Japanese Phone Number Why Get a local Japanese Phone Number

Get a local Japanese Phone Number

Short Term Service available with NO cancellation fee! Short Term Service available with NO cancellation fee!

Short Term Service available with NO cancellation fee!

eSIM IS HERE!

What's eSIM?

What's eSIM?

What's eSIM?
eSIM is a smartphone with embedded SIM otherwise known as Digital SIM.
If you have an eSIM compatible smartphone, you can sign up the mobile service without newly inserting the physical SIM or replacing the SIM with the existing one. If the device has DSDS: dual SIM dual stand by function, you can even use two different carrier mobile services on one device.

Advantages of eSIM
You can have 2 numbers on 1 device.
Therefore, you can keep your US number while having a Japanese number as well!
You can customize your physical and eSIM! Calls and texts can be set to your US number while data can be set to the Y!mobile eSIM.

 

The following Y!mobile
contract patterns are available.

 

Buy a device
from Y!mobile

 
eSIM IN
 
SIM Card IN

 

Use the device
you already have

 
eSIM IN
 
SIM Card IN

Top Three Reasons to Buy Y!mobile

You can carry over unused data to the next month!
High speed and high Quality! Every plan is 5G applicable.
Save more bundling both the internet and family
  • You can carry over unused data to the next month!
  • High speed and high Quality! Every plan is 5G applicable.
  • Save more bundling both the internet and family

Price Plans

  • *2[ Monthly Data Usage] If you exceed the sum of your monthly data allowance (4GB/20 GB/30 GB) and any additional data allowance with Extra Data Option (if you have signed up for it; 2GB/5GB/5GB), the maximum speed is reduced to 300kbps in Simple2 S and 1Mbps in Simple2 M/L, for both transmission and reception until the end of the current month. Additionally if half of the allowance capacity (2GB/10GB/15GB) is consumed, data speed is reduced to 128kbps for both transmission and reception.You can purchase additional data for ¥550 per 0.5GB to go back to the original data speed. Please go to My Y!mobile account to apply.[ Data Carry Over] ●Only the standard allowance and any increased data allowance from extra data options can be carried over; additional data allowance purchased by an application to restore normal speeds cannot be carried over. Fractions of 100MB in the data to be carried over are discarded. ●Data allowance is used in this order: Carried over data → Standard data allowance (including additional data with Extra Data Option) → Additionally purchased data allowance. ●On share plans, data can be carried over while sharing data allowance with the primary connection (while sharing applies). However, the data allowance for the month before sharing with the primary connection begins and any data allowance remaining in the last month when sharing is canceled cannot be carried over. *4[ PayPay Card discount] ●Terms and Condition : When the PayPay Card is designated as the payment method for your usage charges at the billing closing time. ●If the basic charge for the discounted rate plan is prorated daily, the discount amount for this discount service will also be prorated daily. ●If transferred, inherited, or canceled, the discount will terminate at the end of the previous billing month[. Home Bundle Discount Hikari Set (A)] ●Applicable number of mobile (smart phone /cell phone/Tablets/mobile Wi-Fi router) lines are up to 10 lines per 1 line of the Fixed-line Internet Service. *7 Some calls are uneligible such as International roaming, international call (calls to overseas phones), Navi-dial (0570) other some phone number that other companies are charging for, and call assistance (104). *8 Charges vary depending on the number of characters. For more information (▶ymobile.jp/r/sms/)[ Extra Data Option] ●If subscribing or canceling mid month, prorated calculations for monthly charge will not apply. ●When applying for a new contract simultaneously, it will be effective from the month of application. For the other application, it will be effective the following month. ●This option cannot to be combined with previous Extra Data Campaigns (such as double data campaign) *9[ Extra Data Option Free Campaign 3] ●Extra Data Option monthly charge will be 6 months free from the following month of subscription. Also Extra Data Option monthly charge will be free in the month of subscribing. *10 [Important notes for Daretodemo Teigaku+, Super Daretodemo Teigaku+] ●When you subscribe Simple2 S/M/L, the previous Daretodemo Teigaku before Simple2 S/M/L/Super Daretodemo Teigaku (S) will terminate. ●If subscribing or canceling mid-month, prorated calculations for monthly charge will not apply. (When applying for a new contract simultaneously, the prorated calculation for monthly charge will apply) ●When subscribing or canceling in the mid-month (excluding a new contract simultaneously) it will be effective from the following month. ●When changing to a rate plan that is not eligible for this option, this option will be automatically terminated. ●The free calling benefit will not be applied for the calls below. International roaming, international call (calls to overseas phones), calls to Voicemail (1416), calling rates for call forward service, Navi-dial (0570), call assistance (104), other some phone number that we especially designate and publish (▶ymobile.jp/r/telephone/), etc. ●We have the right to end calls we regarded as unusual long calls. ●We have the right to terminate or discontinue service on calls we regarded as unusual activity such as following ・ When connecting other device or equipment without prior consent from us. ・ When in use for the purpose of earning income directly such as communication intermediation, forwarding function, or connection to services provided other companies. ・ Calls made automatically using software and computer programing, excluding those provided by us or our authorized telecommunication carriers. ・ Communications used for purposes other than calling. *11 [60 years or older Permanent Call Discount Campaign]●A document confirming the user’s age is required when applying for the campaign ●Not available with “Domestic Call Discount Campaign when Changing Contracts to a Mobile Handset/Smartphone. ○Activation Fee of ¥3,850 will be charged separately. ○The discount amount of these campaigns are calculated by the basic fees excluding taxes. ○The campaign may change or end at any time without prior notice. ○The information provided is as of September 22, 2023. ○For more detail, go to the WEBthe WEB or check out at our store.

Discount Service

  • ★Free public Wi-Fi (BBmobile point) is available. Separate application is required.[Home Bundle Discount Hikari Set(A)]
    ●Available for up to 10 mobile phone lines (Smartphone/cell phone/tablet/mobile Wi-Fi router) for each fixed line internet service. *1
    Calls between White Hikari phone / BB phone are free only when the recipient also has White Hikari phone / BB phone service available (it makes beep sound twice). *2 Universal service charge, and Relay service charge will be required separately for each phone number. *3 When applying Home Bundle Discount Hikari Set (A).〈Notes〉〇Separate fixed line internet service charges apply. 〇Available for up to 10 mobile phone lines (Smartphone/cell phone/tablet/mobile Wi-Fi router) for each fixed line internet service. ○Family Discount, Wi-Fi Set Discount, and Tablet Discount (for Start campaign), Hikari discount, Home Bundle Discount Hikari Set (A) application benefit cannot be applied together. For more information, go to(http://ymobile.jp/r/hikariset/

  • [Family Discount Service]●Family Discount Service offers a monthly ¥1,100 discount on the basic charge for the second and subsequent lines in the case of Simple2 S/M/L. (up to 9 lines)

Sign-up Guide

Application Fee

For new subscription or device upgrade, in addition to the device purchase cost, an activation fee is required.

Activation Fee ¥3,850

We will in voice the activation fee directly to the contract holder at a later date.
The activation fee cannot be refunded upon cancellation

Payment Method

For monthly payment, using a credit card or bank account transfer is recommended.

Payment with credit card

●After applying, it may take 1 to 2 months for card withdrawals and procedures with financial institutions to be completed. Until then, we will send you a transfer form, so please pay from a convenience store or financial institution. ●If you wish to pay by credit card, we will ask you to use a credit card, and if you wish to pay by bank transfer, we will confirm your bankbook or cash card at the time of application.

Mobile Phone Number Portability (MNP)

When switching from another company to Y!mobile smartphone or mobile phones, you can use Mobile Number Portability (MNP) to keep your current phone number.

  • ●You will no longer be able to use the device you were using with your previous company. Upon termination of that contract, you will also not be able to use the relevant services, such as mail address, payment plans, discount services, contents and e-money services. ●If you have a discount service on your yearly contract, you may be charged for early cancellation of the contract. ●Handling charges as determined by the other carrier apply when transferring from another company. No MNP leaving processing fee or number transfer processing fee is payable when you leave or transfer your number from Y!mobile. ●Depending on the customers contract, you may not be able to make reservations by phone or the internet (MNP reservations are done according to each company’s protocol). ●When using the Mobile Number Portability (MNP) service, the contract with the pre-transfer carrier is canceled the moment the transfer process is completed by the post-transfer carrier. In the event the transfer process is conducted during a period which is not the contract renewal month of the pre-transfer carrier, a penalty for breach of contract may be charged depending on the content of the contract between the pre-transfer carrier and the customer. Please be aware that when conducting the transfer process (MNP) via the Internet, time may be required for the transfer process to be completed.

Documents for application

■ Proof of identification

Under the Mobile Phone Improper Use Prevention Act, you are required to present the documents stipulated by Y!mobile when you enter into a contract. See the Y!mobile website (▶https://www.ymobile.jp/support/process/honkaku/) for details. You are required to present the documents in the box below when applying for an instalment purchase contract.

Please have the original documents with you. Photocopies are not accepted. The documents presented are not used for other than applicant identification. We may ask you to present one or more of the following documents depending on the contents of your application:

Residence Card + Foreign Passport
or
Special Permanent Residence Certificate
■ Document must be valid. 
■ Must have your current address written on it.
  • ※ If the document shows an address different from your current address or no address at all, supplementary documents will be required.
  • ※ We do not accept residence cards with the residence status of“none”.
  • ※ Without the proper residence status, you will not be able to enter into a contract for instalment payment.
  • ※ You do not need to show your foreign passport if your residence status is “Permanent Resident (PR)” or “Highly Skilled Professional (ii).”
  • ※ For an up-grade, you do not need to show your foreign passport if you present your Residence Card.
  • ※ Foreign nationals applying for instalment purchase contracts or per-item credit purchase brokerage contracts will need these confirmation documents.

■ Supplemental Documents

  • ● An original copy of a Certificate of Items Stated in Resident Register received within the last 3 months, a utility bill payment receipt proving you live in Japan(electric bill, gas bill, water bill, etc.), a document notarized by a municipality of Japan.
  • ● A document with your current address.(We cannot accept documents that we cannot confirm your correct address with, such as ones showing only the building name or room number)

Important Notes on Data Service

PDF file

Y!mobile Customer Support

For general inquiries or technical support, contact one of the following numbers.

Business hours 10:00am-7:00pm(for general information)
From Y!mobile handset 151 Press “5” for English support
From landline 0570-039-151

We have shops on all major US military installations in Japan, with English Speaking Crew to support your needs.
Y!mobile service sign up is available at any on base SoftBank shop.

Due to the current circumstances, operational hours of each shop may change.
Please confirm the shop operational status and hours before visiting.

Mainland Japan

Atsugi [NEX]

Location: Building 958
Hour: Mon-Sat 10:00-18:00
Sun Closed
DSN: 264-5858
TEL: 0467-63-5858

Yokosuka [NEX]

Location: Building 1559
Hour: Mon-Sat 10:00-20:00
Sun 10:00-18:00
DSN: 241-2001
TEL: 0468-96-2001

Sasebo [NEX]

Location: Building 230
NEX Main Store
Hour: Mon-Sat 10:00-19:00
Sun/US Holiday 10:00-18:00
DSN: 252-3563
TEL: 0956-50-3563

Iwakuni [MCCS]

Location: Building 410
Crossroads Foodcourt
Hour: Mon-Sat 10:00-18:30
Sun 10:00-17:30
US holiday 12:00-17:00
DSN: 253-5851
TEL: 0827-79-5851

Yokota [AAFES]

Location: Building 570
1st floor of the YCC
Hour: Mon-Sat 10:00-19:00
Sun 10:00-18:00
DSN: -
TEL: 03-6868-2348

Zama [AAFES]

Location: Building 406
Exchange Annex Bldg.
Hour: Mon-Sat 10:00-18:00
Sun 10:00-17:00
DSN: -
TEL: 03-6868-2382

Okinawa Japan

Kinser [AAFES]

Location: Building 1227
PX location
Hour: Tue-Sun 10:00-18:00
Mon Closed
DSN: 637-3400
TEL: 098-878-5769

Foster [AAFES]

Location: Building 1002
Market Place
Hour: Mon-Sun 09:00-19:00
DSN: 646-2104
TEL: 098-971-2104

Courtney [AAFES]

Location: Building 4131
Commissary / PX location
Hour: Tue-Sun 10:00-18:00
Mon Closed
DSN: 622-6015
TEL: 098-954-6015

Kadena [AAFES]

Location: Concessionaire
Mall Bldg 412 BX 1st floor
Hour: Mon-Sun 09:00-20:00
DSN: -
TEL: 03-6868-2241

Hansen [AAFES]

Location: Building 2419
Foodcourt / PX location
Hour: Mon-Sat 10:00-19:00
Sun 10:00-18:00
DSN: 623-5951
TEL: 098-969-5951

FAQ

I am interested in getting a plan, but I prefer to keep using my US number as well.
Is there a way to use two phone numbers in one device?

Yes, if your device is unlocked we can offer you a Y!mobile eSIM.
You can continue to use your stateside SIM and an embedded SIM with Japanese phone number simultaneously. *Conditions apply

I have a device that I used in the US, can I continue to use it?

If you could get the USIM unlocked on your current device, in most of the cases you can keep using your device just subscribing for Y!mobile USIM only contract.

I am staying for a short period of time. Do you have a prepaid (pay as you go) service?

We also offer prepaid service. Y!mobile plan can be canceled at any time without any cancellation fee. We suggest our regular service plan as it is reasonable without 2 years commitment.

I am currently using SoftBank. Can I switch over to Y!mobile or vice versa?

Yes, of course! You can keep the same phone number and switch over between two brands free of charge.

Does Y!mobile offer 5G network service?

Yes, all service plans are 5G compatible. You can check the current service area map from our SoftBank website.

Does Y!mobile offer an unlimited data plan?

Y!mobile offers 3GB, 15GB, and 25GB data.
Our primary brand, SoftBank will be your best choice for unlimited data.
Please check the site below.
Mobile Service for US Military in Japan, SoftBank
Both SoftBank and Y!mobile phones and services are available at on base SoftBank shops.

What happens if I exceed the default data amount?

Even after the contract data amount is used up, you can continue to use the data at a speed of 300 Mbps for Simple S, and 1 Mbps for Simple M and L.

What do I need to get started?

Please visit your nearest on base SoftBank shop with your:
1) Military ID, or SOFA ID
2) States ID, Stateside Driver’s License, or U.S. Passport
3) Credit card or debit card for your monthly payment method
4) Ensure your device is UNLOCKED by your carrier for SIM only account

Can I apply online or do I have to visit a shop?

If you live off base you can apply online from our Y!mobile Japanese website.
We highly recommend you to visit the shop for English consultation.

How can I terminate my service? Can I request the date in advance?

Please visit your nearest Softbank shop on the day you wish to terminate your service.
No, there is no advance service termination reservation at this time.

Go to top

Also check the site below if you are looking for unlimited data plan or latest phone models.
Mobile Service for US Military in Japan, SoftBank

日本語 / ENGLISH