In order to use pixiv more securely, please use a password that you are not using for other sites and that a third party won't be able to guess.
- Set a password with many characters
- Don't use the same login ID/password as other services
- Don't use "repeated letters" in the password
- Do not use your date of birth or phone number in your password
- Do not use simple words such as "password" for your password
Alphanumeric characters (a-zA-Z0-9) and symbols ( =+*:;!|$&%#@~.,?_"&#'(){}[]<>^/\ ) can be used in passwords.
Please follow the procedure from the following URL to change your password.
https://accounts.pixiv.net/password/change