How to check the code to confirm that all the codes has been used for Jurina only
***NOTE : This method is work only for Japanese website system (Link)
It's simple, just Vote Jurina again with the used code.
If that code was used for Jurina, it will be show up the time that the code was used.
If it was used for vote someone else, it will show up error message like this.
Therefore, you can check all codes from our project that we used them for Jurina ONLY ^^