A suffix attached to the head of a government ministry, used to denote a minister (e.g., 外相, 財務相).
外相（がいしょう）は来週、記者会見を開く予定だ。
The foreign minister is scheduled to hold a press conference next week.
財務相（ざいむしょう）は新しい税制案を説明した。
The finance minister explained a new tax proposal.
日本語では省庁の長に『相』を付けて呼ぶことが多い。
In Japanese, it is common to attach '相' when referring to the heads of ministries.