The way you change your password will be different depending on if you know your password or not. Please refer to the following steps for the respective situations.
1) If you know your password, you can change your password after logging in.
After you sign in, you can change your password on the Account Settings page: http://iknow.jp/account/edit.
Select "Password" tab and enter your “Current password” and your “New password” then “Confirm your new password” and click the “update” button to save the changes.
2) If you’ve forgotten your password, you can reset it at: https://iknow.jp/passwords/forgot.
After you enter your registered email address, you’ll receive an email notice to reset your password.
Please access the URL link in that email to reset your password.
Depending on the email client, the URL link may be displayed in two lines.
Please make sure that you copy the full link.
If the wrong URL is entered, the regular log in page will be displayed in stead of the “Change password” page.
Please note that the URL will become ineffective 30 minutes after it is issued.