A seasoning apparatus includes: a table on which a stack of paper sheets is loaded, each of the paper sheets having at least one face on which active light curable aqueous ink has been deposited; an air blowing device which blows air in an air blowing direction to a side of the stack loaded on the table; an active light emission device which emits the active light in an active light emitting direction to a side of the stack loaded on the table; and a control device which causes the air blowing device to blow the air to the stack to create gaps between faces of the paper sheets, and causes the active light emission device to emit the active light to the stack to cause the active light to enter the gaps.