Please download "J-GATE3.0_Password_Reset_Unlock_Application" from the System Documents Site , fill in the required information on the form, and send it to "j-gate3@jpx.co.jp" by email.
If you are not sure of the account and password for the System Documents Site, please feel free to contact JPX Service Desk (J-GATE) at j-gate3@jpx.co.jp.