You can change your reserve amount with the following process.
After logging into your Zaif account, access your account page.
1. Click the “Coin Reserve” icon.
2. Click “Coin Reserve Settings”.
3. Click “Modify Monthly Purchase Amount Settings”.
4. Change the amount, and then click “Save Settings”.
Amounts that have already been withdrawn cannot be changed afterwards. Please make your changes before the 10th of each month, when the withdrawal amount is finalized.