[Important] Regarding Multi-Factor Authentication on keio.jp 

📢 Introduction

Important Notice Regarding Security Enhancement for keio.jp Users (Excluding Alumni and Guarantors)

As a countermeasure against the recent increase in unauthorized access, we have made the setup and use of "Multi-Factor Authentication (MFA)" mandatory when logging into keio.jp.

Consequently, it is no longer possible to sign in using only your "Keio ID" and "Password." We appreciate your understanding and cooperation in ensuring the secure use of our services.

(Reference) Multi-factor authentication setting count data 

🔐 What is Multi-Factor Authentication (MFA)?

MFA adds a second verification step using your smartphone, in addition to your traditional password.
Think of it as adding a second lock to your front door.
Even if someone steals your password, they cannot login without the "second key" (your smartphone), drastically improving security.

Request for Multi-Factor Authentication (MFA) Registration

To enhance security, please register your authentication factors for Multi-Factor Authentication (MFA).

We strongly recommend registering two or more authentication methods to ensure you can still access your account in the event of device loss or hardware failure.

Recommended Methods:

• For Backup/Recovery: Phone (SMS or Voice).

• For Daily Use (Smartphone): Passkey (Biometrics / PIN) or the Okta Verify app.

• For Daily Use (PC): Passkey (Biometrics / PIN) .

To set up your Multi-Factor Authentication, please refer to the "keio.jp Multi-Factor Authentication Setup Manual"

✨ Go "Passwordless" for Convenience
You might think, "Authenticating twice every time seems troublesome."
By setting up the recommended Passwordless method, you can skip entering your password entirely.
Log in securely and easily just by tapping your phone or using Face/Fingerprint ID.

📞 Regarding Phone Number Registration 

Phone authentication (SMS/Voice) carries risks such as interception of verification codes and unauthorized call forwarding. Consequently, transitioning to more secure authentication methods has been highly recommended in recent years. Okta, the provider of the keio.jp authentication platform, also deprecates Phone (SMS/Voice) factors and recommends using alternatives like Passkeys (Biometrics/PIN).

If you currently use Phone (SMS/Voice) as your primary Multi-Factor Authentication (MFA) method, please register and switch to "Passkey (Biometrics/PIN)" or "Okta Verify App" as soon as possible.

Although Phone (SMS/Voice) authentication is expected to remain available after June 1, 2026, as a backup option for situations such as device replacement or malfunction, its regular use will be deprecated to enhance security. (Please note that this method may be discontinued in the future.)

What Is SMS Authentication and Is It Secure?

https://www.okta.com/blog/identity-security/sms-authentication/

Note: For users staying overseas (e.g., studying abroad)

• Multiple phone numbers can be registered simultaneously, including international numbers. 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 (such as Passkeys or Okta Verify) to prepare for risks such as device malfunction or loss.

✅ Recommended Methods (Choose one)

① Okta Verify App
    Install the app on your smartphone to use “Face ID” or “Touch ID.” No more password entries!
    You can also use the authentication method where you check and tap notifications sent to your phone.

② Passkey (Biometrics/PIN) 

　Use your device's Face ID, Fingerprint, or PIN. No password typing needed! 

For details about Passkey, please see below.
What is passkey authentication?（MACNICA）

📖 Multi-Factor Authentication Setup Procedure

If you need to set up multi-factor authentication, please refer to the "keio.jp Multi-Factor Authentication Setup Manual" 

❓Frequently Asked Questions (FAQ)

For frequently asked questions (FAQ) about multi-factor authentication, please refer to the following page.

・About keio.jp Multi-Factor Authentication (MFA) - Frequently Asked Questions (FAQ)

🗓️ Schedule

Now required 

Students(Regular Programs):Monday, February 9, 2026

Students(Correspondence Course Students ):Friday, May 1, 2026 

Staff:Tuesday, May 12, 2026

Faculty:Monday, June 1, 2026