na-adjective, noun which may take the genitive case particle 'no', noun, used as a suffix, noun
Used to describe something that ranks among the top in a category, often in formal or written contexts. Frequently appears as a suffix-like modifier in compounds such as 世界有数 (world-leading) or 日本有数 (one of Japan's foremost).
See also: 世界有数
彼は日本有数のピアニストだ。
He is one of Japan's foremost pianists.
この地域は世界有数の観光地として知られている。
This region is known as one of the world's leading tourist destinations.