The reserve schedule is posted on the Zaif coin reserve page.

It becomes part of the excerpt in the page shown above, but giving the example of having 10,000 yen as reserve amount every month,
10,250 yen will be withdrawn (2.5% admin fee applies) to the financial institution on the 27th of every month (carried out on the next business day if it falls on a weekend), and 10,000 yen will be pooled for use as reserve funds.
The purchase sum is determined per diem from the 10th of the following month to the 9th of the next following month (including weekends and public holidays), and cryptocurrency reserves will be purchased based on the daily buying rate.