Price Plans

The basic charge is guaranteed to never increase! Every plan is 5G^※1 applicable

5G with a high-speed and a large-capacity (new frequency is 3.7 GHz only) is offered in a limited area. Please go to area map for details (▶ymobile.jp/s/5garea).
You are required to prepare 5G device to use 5G communication.

• [Data Carry-over Option]
• • Simple S/M/L subscribers can carry over to the next month any data allowance on their plan (including additional data with Extra Data Option) remaining after deducting the data used in the current month (discarding fractions of 100 MB).
• • 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 100 MB in the data to be carried over are discarded.
• • 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.
• • Data allowance is used in this order: Carried over data → Standard data allowance (including additional data with Extra Data Option) → Additionally purchased data allowance.
• *1 [About 5G service]
• • Service areas for 5G is initially limited, some users may stay in using 4G service in the main.
• • It is best to check 5G available areas on the website (▶https://ymobile.jp/s/5garea) before device purchase. Even if your device shows 5G on the screen, it may switch to 4G when you start communication.
• • In 5G service areas, transmission speed may be reduced compared with that of initial status as users increase in the future.
• *2 Family Discount Service that is applied from the second or subsequent lines is ¥1,188/month. This service cannot be applied together with Home Bundle Discount Hikari Set (A) .
• *3 [Monthly Data Usage] If you exceed the sum of your monthly data allowance (3 GB/15 GB/25 GB) and any additional data allowance with Extra Data Option (if you have signed up for it; 2 GB/5 GB/5 GB), the maximum speed is reduced to 300kbps in Simple S and 1Mbps in Simple M/L, 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.
• *4 Charges vary depending on the number of characters. For more information (▶ymobile.jp/r/sms/)
• *5 [Extra Data Option Free Campaign 2] First time applicant for Extra Data Option (¥550/month) will enjoy 12 months free of charge from the following month of subscription. During the month of application, discount is applied as an extra privilege. For using the increased data amount by Extra Data Option, self application is required to go back to the normal speed.
• *6 When you subscribe Simple S/M/L, Super Daretodemo Teigaku for Smartphone Basic plan will terminate.
• *7 [Note for Daretodemo Teigaku and Super Daretodemo Teigaku (S)]
• ※ 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), Tele-dorm (0180), call assistance (104), other some phone number that we especially designate and publish (▶ymobile.jp/r/telephone/), etc.
• ※ The company reserves the right to end any call that continues for an unusually long period of time.
• ※ Regarding calls to phone numbers specified by company and announced (▶ymobile.jp/r/telephone/), or call forwarding services (calls made by a telecommunications service phone numbers owned by other telecommunications carriers [hereinafter "forwarding source phone numbers"] to other phone numbers provided by a telecommunications carrier that has a forwarding source phone number for making calls as the main purpose), such calls are not applicable for free calls of this service, therefore, call charges according to the price plan you are using will be applied.
• ※ We have the right to terminate or discontinue service on calls we regarded as unusual activity. When connecting other device or equipment without prior consent from us. When in used for the purpose of earning income directly such as communication intermediation, forwarding function, or connection to services provided by 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.
• *8 If you are 60 years old or older at the time of execution and subscribe Simple S/M/L, monthly charge of Super Daretodemo Teigaku (S) (application required) is covered with discount. Not available with “Domestic Call Discount Campaign when Changing Contracts to a Mobile Handset/Smartphone.”

• ○Activation Fee of ¥3,850, Universal Service Charge, and telephone relay service charges will be charged separately.
• ○If any campaigns or discounts seen here are terminated, there will be a notification on Y!mobile website.
• ○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 March 23, 2023.

Sign-up Guide

Payment Method (Options)

For monthly payment, using a credit card is recommended.

Application Fee

Cell Phone Number Portability (MNP)

When changing from another company to Y!mobile smartphones or cell phones, you can keep the current phone number by using the Cell Phone Number Portability (MNP) or number transferring service.

STEP 1

Get an “MNP Reservation Number” from the cellphone carrier you are currently contracted for.

STEP 2

Take your MNP reservation number and visit Y!mobile store.

※The MNP reservation number is valid for 15 days, including the issue date.

• ※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 cancelled 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.

Important Notes on Data Service

Y!mobile Customer Support

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