noun
mortgage debtor; mortgagor
Legal term for the person who grants a mortgage over their property as security for a debt.
抵当権設定者は、債務不履行の場合に担保物件を失うリスクがある。
The mortgagor risks losing the collateral property in case of default.
抵当権者 is the mortgagee (the lender who holds the mortgage), while 抵当権設定者 is the mortgagor (the borrower who grants the mortgage).
Compound of 抵当権 (mortgage right) + 設定者 (person who establishes/sets up).