■ For Players in Japan
To help minors and their guardians use the service with peace of mind, monthly Herostone purchase limits apply by age.
Minors must get permission from a parent or legal guardian before making a purchase.
| Age | Monthly Purchase Limit |
| Under 14 | Up to ¥5,500 per month |
| 14–17 | Up to ¥11,000 per month |
| 18 and older | No limit |
*Once registered, your birth month and year cannot be changed.
*Registered information is used only for the protection of minors and not for any other purpose.
■ For Players Outside of Japan
Players under the age of 16 cannot purchase Herostones within the app.
*Once registered, your birth month and year cannot be changed.