also: にっぽんいち
noun, noun which may take the genitive case particle 'no'
Japan's best; number one in Japan
Used to describe something or someone that is the best, largest, or most outstanding in Japan. Can function as a noun or as a prenominal modifier with の.
富士山は日本一高い山です。
Mt. Fuji is the highest mountain in Japan.
彼は日本一のピッチャーだ。
He is the best pitcher in Japan.
He became the best in Japan on the math test.
This ramen shop is famous for making the best ramen in Japan.
She practices every day aiming to become the best in Japan.