Email addresses for students

Each undergraduate and graduate student at YNU as well as each graduate student from the United Graduate School at Tokyo Gakugei University who is assigned to YNU will receive a YNU Mail.

YNU Mail Account (Email account service)

YNU Mail Account is a service that provides email addresses that students can use from the moment they are admitted to YNU. The service enables emails to be sent and received from YNU’s official domain, ‘,’ via Office 365 for Education, a free email system provided by Microsoft for educational institutions.

How to check your assigned YNU Mail and initial password
Log in to Account Management System and go to [Profile].
Rule for assigning YNU Mail address
“ Surname - First name - Two random letters @ ”
URL for signing in to Office365

Multi-Factor Authentication

Multi-Factor Authentication Setting Guide

Change how you do additional verification

Sign in to YNU Mail using your password and second verification method.

Then open [View Account] > [Security Info] and perform Multi-Factor Authentication.

Set up the notification option. (phone, alternate phone, authenticatorapp)

* If you can’t reconfigure MFA yourself (that is, you can’t authenticate using both phone and app methods), please check here.

Self-service Password Reset

Before you forget your Office365 password, configure self-service password reset.

By doing so, even if you forget your password, you can reset it if you specify your contact information and answer your secret question.

Sign in to YNU Mail using your password and second verification method. Then open [View Account] > [Security Info] and perform Multi-Factor Authentication. Click [+ Add Method] to set up your contact information, secret question, etc.

*This page is the same as the Multi-Factor Authentication setting screen.

If you have forgotten the password
In the sign-in window, click [ Can’t access your account? ] or [Forgot my password]to complete the self-service password reset.
* If you cannot reset the password by yourself, please check here.

Installing Microsoft Office

Installing Microsoft Office

For more details about YNU Mail

Frequently Asked Questions

Emails from senders do not reach me.

Emails flagged as spam by the spam filtering system will not reach you. Check if the emails have been placed in your spam folder.


About changing the display name of YNU mail (Office365)

Due to the specifications of Office365, users cannot change the display name of YNU mail by themselves.
If you wont to change the display name, please apply using the form below.
Changes will be made within approximately one week after the application is accepted.

  • Please access the application form when you are signed in to Office 365 with your YNU email address.
  • You can only apply for a change if the display name is the same as your email address.