【After Mandatory】 Procedures for users authenticating via PC and telephone (voice calls only)

These instructions outline the procedure for two-factor authentication using a password and a voice call, specifically for users who are operating a non-Windows computer and possess a telephone with voice-only capabilities.

Note 1: Registering phone authentication when staying overseas (e.g., studying abroad)

Multiple phone numbers can be registered simultaneously, and international numbers can be specified. However, due to the specifications of the SMS/Voice authentication system used by Okta, authentication codes may not be delivered to phone numbers outside of Japan (+81). In such cases, the registration process will not be completed successfully.
If you do not receive an authentication code within approximately 3 minutes during registration, that phone number may not be compatible with SMS/Voice authentication. If this occurs, please ensure you register multiple alternative authentication factors to prepare for risks such as device malfunction or loss.

1. Multi-Factor Authentication Setup (Phone)

2. How to log in to keio.jp (Two-factor authentication using a password and an authentication code via voice guidance)

1. Multi-Factor Authentication Setup (Phone)

Please refer to the descriptions provided either to the right of or below the images for an explanation of each step

1.1. Access keio.jp

Access keio.jp (https://keio.jp) using your smartphone browser and log in with your keio.jp account (ID and password).

1.2. Click "Set up" in the "Phone" section.
(If you replace your computer, biometric authentication data will be lost, which will prevent you from logging in on your new device. To ensure you have a way to recover access on your own, please set up phone authentication if you have a phone available.)

1.3. Set up phone authentication

Select "Voice call," choose "Japan" for "Country/Region," enter your phone number, and click "Receive a code via voice call." (When "Voice call" is selected, an extension field will be displayed; please leave this field blank.)

1.4. Set up phone authentication

Enter the verification code (5 digits for voice call) sent to your registered phone number via voice message, and click "Verify."

1.5. Proceed to the Set up security methods screen and confirm that the “Continue” button is displayed.

If the “Continue” button appears below the security method setup screen, your phone-based multi-factor authentication setup is complete. Tap “Continue” to log in to keio.jp.

2. How to log in to keio.jp (Two-factor authentication using a password and an authentication code via voice guidance)

Please refer to the descriptions provided either to the right of or below the images for an explanation of each step

3.1. keio.jp sign-in screen on a computer browser

Access keio.jp (https://keio.jp), enter your Keio ID in the Username field, and tap "Next".

3.2. Verify with your password

Enter your keio.jp account password and tap "Verify."

3.3. Verify with your phone

To authenticate via voice call, click "Receive a voice call instead."

3.4. Verify with your phone

Enter the verification code (5 digits for voice call) sent to your registered phone number via voice message, and click "Verify."

End of Document.