diff --git a/src/pages/en/utokyo_account/index.mdx b/src/pages/en/utokyo_account/index.mdx
index cb8db71eb1..9996d3260a 100644
--- a/src/pages/en/utokyo_account/index.mdx
+++ b/src/pages/en/utokyo_account/index.mdx
@@ -65,6 +65,9 @@ Many of the ICT systems that allow users to sign in using their UTokyo Account a
 ### Validity period of a password
 {:#password-expiration}
 
+If you are using Multi-Factor Authentication, your password does not expire. Otherwise, your password is valid for 397 days (1 year + 1 month) after it is changed. The expiration date of the current password can be checked from [the User Menu](https://utacm.adm.u-tokyo.ac.jp/webmtn/LoginServlet).
+*Before March 9, 2023, passwords were valid for 365 days regardless of whether or not Multi-Factor Authentication was enabled (see [this page](/en/notice/2023/03-utokyo_account-password) for details). Passwords set before March 9, 2023 will remain valid for 365 days and will not be extended, and passwords set after that date will have a new validity period.
+
 A password is valid for one year after it is changed. The expiration date of your current password can be checked from the [User Menu](https://utacm.adm.u-tokyo.ac.jp/webmtn/LoginServlet).
 
 ### Changing passwords
@@ -106,6 +109,11 @@ If you have not registered your email address, or if the above procedure does no
 
 After completing the procedures, you will receive a "Notification regarding password for the UTokyo Account" containing your initial password. Please change your initial password to a new one, referring to "Task: Change the initial password" in [How to start using UTokyo Account](#procedures). (You cannot use the ICT services with your initial password.)
 
+<details>
+	<summary>When the error message “You can't reset your own password because you haven't registered for password reset.” appears</summary>
+	Since your email address is not registered in the system, a notification email cannot be sent to you and therefore your password cannot be reset. Please [reissue a password from the help desks](/en/utokyo_account/#reissue-password). Once your password has been reissued, please register your email address in UTAS (for students) or Personnel Information MyWeb (for faculty and staff).
+</details>
+
 ## Multi-Factor Authentication (MFA)
 {:#mfa}
 
diff --git a/src/pages/utokyo_account/index.mdx b/src/pages/utokyo_account/index.mdx
index 67071030b5..22517875b1 100644
--- a/src/pages/utokyo_account/index.mdx
+++ b/src/pages/utokyo_account/index.mdx
@@ -66,7 +66,7 @@ UTokyo Accountを用いるとさまざまな情報システムが利用可能で
 
 多要素認証を利用している場合は，パスワードに有効期限はありません．一方，多要素認証を利用していない場合，パスワードは変更してから397日（1年+1ヶ月）間有効です．現在のパスワードの有効期限は，[利用者メニュー](https://utacm.adm.u-tokyo.ac.jp/webmtn/LoginServlet)から確認することができます．
 
-<div class="box">※以前は，多要素認証を利用しているかどうかにかかわらず，パスワードの有効期間は365日でした（<a href="/notice/2023/03-utokyo_account-password">詳細はこちら</a>）．変更日である2023年3月9日までに設定したパスワードの有効期間は365日のままで延長されておらず，同日以降に設定したパスワードから新しい有効期間になっています．</div>
+<div class="box">※2023年3月9日以前は，多要素認証を利用しているかどうかにかかわらず，パスワードの有効期間は365日でした（<a href="/notice/2023/03-utokyo_account-password">詳細はこちら</a>）．2023年3月9日までに設定したパスワードの有効期間は365日のままで延長されておらず，同日以降に設定したパスワードから新しい有効期間になっています．</div>
 
 ### パスワードを変更する
 {:#change-password}