Motoori Norinaga, through his research on the national language and writing system (Japanese kanji readings), analyzed the original sounds of kanji and how they were adapted in Japan. He was a scholar of Japanese classical studies who aimed to eliminate the influence of foreign-language kanji readings, which he believed were incompatible with the Japanese spirit, and to revive a uniquely Japanese language. Motoori Norinaga's research on kanji readings was not merely an analysis of language; it was an important part of his national studies, which emphasized the Japanese spirit and sought to revive it.