suffix
minister (of a government department)
Suffix attached to the name of a government department to form the title of its minister, e.g. 外務大臣 (Minister for Foreign Affairs) uses 大臣, but 相 appears in titles like 外相 (Foreign Minister).
彼は新しい外相に任命された。
He was appointed as the new Foreign Minister.
内相と外相が会談した。
The Home Minister and the Foreign Minister held talks.