Contact

Contact us

　Common Infrastructure System Group
　Information Infrastructure Operation Room
　Organization for Innovations in Data Synergy
　(Digital transformation Division, Information Department)

　TEL：(022)217-6179　Ext.91-6179
　E-mail：tumail*grp.tohoku.ac.jp （Replace "*" with "@"）

　In the event of a major Google outage, please contact
　E-mail：d7148de0.msotohoku.onmicrosoft.com*jp.teams.ms （Replace "*" with "@"）


　Reception hours：9:00～17:00
　(except on Saturday, Sunday, National holiday, and Administration Bureau holiday）
　※Basically,after-hour email inquiry will be responded the next working day.



If you cannot log in to Google Workspace

If you cannot log in to Google Workspace (TU Mail, DCMail, Google Drive, etc.), please check the following.

<Password Authentication Issues>

▶ If you have forgotten your Google Workspace password
If you have forgotten your Google Workspace password, you can reset it using the link below.
If you have trouble using the link below, please use this one instead. After reviewing the details, you will receive instructions via email.

　Google Workspace Password Reset Request Form
(authentication with Tohokudai ID and password required)

  • After accessing the above link, you will be prompted to authenticate using your Tohokudai ID and password.
  • Once authentication is successful, you will be redirected to a Google Form. Please note that the URL of this Google Form is unique to each individual and must not be shared with others.
  • Please read the instructions on the Google Form carefully and complete the form accordingly.

▶ If you cannot log in despite entering the correct password
Please check the following points.

  • The password for your Tohokudai ID is different from the Google Workspace password. Please enter your Google Workspace password.
  • Your password is mandatorily changed upon your first login, so the password on your Tohokudai ID notification cannot be used. Please enter the changed password.
  • Check for typos, including uppercase/lowercase and full-width/half-width characters.
  • Ensure that an old password saved in your browser is not being automatically entered.
If the issue persists, please request a password reset using the form above.

<2-Step Verification Issues>

▶ If your registered verification method is unavailable
If you have registered other verification methods, select "Try another way" on the login screen.
If you have saved backup codes in advance, please use a backup code to log in.
Google Help: Sign in with backup codes

▶ If you do not have backup codes or have not set up 2-Step Verification
If you cannot use any registered verification methods and do not have backup codes, or if you missed the setup deadline (Existing accounts: Oct 31, 2026 / New accounts: roughly within 14 days of issuance), please issue backup codes for 2-Step Verification from the form below.

　Google Workspace 2-Step Verification Backup Code Request Form
(authentication with Tohokudai ID and password required)

<Other Issues>

▶ If you cannot log in with the correct Google account
You might be logged in with a different account, such as a personal Google account.
Check your account from the profile icon at the top right of the screen and switch to your Tohoku University Google account.
- Faculty/Staff: TU Mail (@tohoku.ac.jp)
- Students: DCMail (@dc.tohoku.ac.jp)
Additionally, browser cache or cookies might be causing the issue. Try logging in with a different browser or using private browsing (incognito mode).


Regarding Suspicious Emails

If you receive any suspicious emails, such as targeted attack emails (spear-phishing), please check the following page and report the incident to the Tohoku University CSIRT.
　Suspicious Email Report(On-campus access only)

Incident Response

When an incident caused by a user such as a spam outgoing by TU mail occurs,temporarily stop using TU mail.
Please contact "Contact" on the page if your email is suspended.