How to change your password
1.Access and login to My SoftBank and then click "Change password"
.

2.Enter your mobile phone number and the four-digit PIN number you specified in your contract application,
and then click "Next"
.

3.Enter your new password and then click "Apply the above settings"
.

4.This completes the procedure for changing your password.
Users of SoftBank 3G mobile phones, SoftBank X Series, iPhones, or Prepaid mobile phones will have their new password sent to them via SMS.

