■ About Password Strength
The system password policy for Teachme Biz accounts is as follows:
【Available Character Types】Numbers 0-9, uppercase letters A-Z, lowercase letters a-z, symbols
【Character Count】Between 8 and 64 characters
【Other】Cannot be identical to account name, password strength must be "Intermediate" or higher
Please note that you cannot change to a custom password policy.
Reference: What symbols can be registered as a password https://help.teachme.jp/hc/en-us/articles/900005509666
Reference: What are the criteria for "Strong, Intermediate, Weak" password strength ratings https://help.teachme.jp/hc/en-us/articles/4401857525785
■ About Two-Factor Authentication
The product itself does not support two-factor authentication, but it does support SAML authentication, so you can indirectly implement it by setting up single sign-on.
Please check the link below for details.
Reference: Configure single sign-on (SSO)
https://teachme.jp/8/manuals/11468504/
■ About Regular Password Changes
In accordance with the Ministry of Internal Affairs and Communications security guidelines, we do not provide a feature for regular password changes. If necessary, please ensure implementation through your company's internal operations.
Reference: Safe Password Management
https://www.soumu.go.jp/main_sosiki/cybersecurity/kokumin/security/business/staff/06/