Points to note when participating in the stamp rally
 Recommended environment for use
iPhone
iOS 13.0 or later

safari
Please turn off the private mode setting.
Android
Android 5.0 or later

chrome
Please turn off the incognito mode setting.
We do not recommend any browsers other than those installed on smartphones with the above operating systems.
If the private mode/secret mode setting is on, cookie information will be automatically deleted, so stamp information will not be retained.
You can only participate in the stamp rally from your smartphone.
This version is not supported.
If you open the stamp rally from SNS (facebook/X/instagram/LINE), please reopen it in the standard browser. If you play in the in-app browser, the stamps will disappear.
 Cookies information