Yahoo! JAPAN ワンタイムパスワード

One-time password is a security function that strongly protects your Yahoo! JAPAN ID from unauthorized use. When you start the app, you will be issued a password that is valid only once.

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We sincerely apologize for the inconvenience, but Yahoo! JAPAN has decided to discontinue the provision of the "Yahoo! JAPAN One-Time Password" application on March 31, 2021.

As a result, the setting for receiving one-time passwords using this application will end on September 28, 2020.

We sincerely apologize to everyone who has used this app for a long time.

From now on, please use SMS or email as a method of receiving one-time passwords instead of the app.

See the guide below for details.

https://id.yahoo.co.jp/security/otp.html

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It is a software token application that supports the security function "one-time password" of Yahoo! JAPAN.

This application generates a "one-time valid password (code) that changes every 30 seconds".

If you set a "one-time password", authentication with this "code" will be added to your usual "Yahoo! JAPAN ID and password".

◇ Easy operation for smooth authentication!

You can check the "code" immediately by launching the app, so it does not take time to authenticate.

◇ Set a one-time password for peace of mind!

In the unlikely event that someone else knows your password, you can rest assured that the "code" will only be known to the app owner, so no one else will be able to log in without permission.

◇ Main features

・ Smooth authentication (code copy function)

・ Code issuance even in places where there is no radio wave

・ RFC standard HOTP is adopted

See the guide below for details.

https://id.yahoo.co.jp/security/otp.html

■■■ Caution ■■■

-In the following cases, you will not be able to log in. Be sure to make a backup in advance or stop the one-time password setting and then set it again.

-When deleting the one-time password in the app or deleting the app

-When changing the terminal due to a model change, etc.

* Please check the Yahoo! JAPAN Terms of Service (including software guidelines) before using this application.

■ Yahoo! JAPAN Terms of Service

https://docs.yahoo.co.jp/docs/info/terms/

■ Privacy policy

https://docs.yahoo.co.jp/docs/info/terms/chapter1.html#cf2nd

■ Software guidelines

https://docs.yahoo.co.jp/docs/info/terms/chapter1.html#cf5th