Why was the word tetsugaku created in Japan during the modern period?

The term tetsugaku was created in Japan during the modern period, specifically following the Meiji Restoration in 1868, to serve as a translation for the Western concept of "philosophy."1

The word was coined by combining the Japanese characters for "wisdom" (tetsu) and "learning" (gaku). This linguistic innovation was part of a broader effort by scholars, most notably Nishi Amane, to develop modern philosophical terminology in Japanese. By creating these terms, Japanese intellectuals were able to systematically engage with, analyze, and compare Western thought with traditional East Asian intellectual frameworks.12

While tetsugaku was initially used primarily to describe scholarly reflection on Western philosophy, its application soon expanded to encompass a much broader range of intellectual inquiry, eventually facilitating the development of distinctively Japanese philosophical movements, such as the Kyoto school.1