Which country did Matcha originate from?

Matcha originated in China.
Its history dates back to the Song Dynasty (960-1279) in China, where it was known as "ground tea" or "whisked tea"—a method of consuming tea by grinding tea leaves into powder. In the 12th century, Japanese monks brought this tea culture back to Japan, where it was refined and popularized, ultimately evolving into the modern matcha tradition.