He is best known as chief editor of the Dai Kan-Wa jiten, a comprehensive dictionary of Chinese characters, or kanji.

His name, Tetsuji, is derived from the name of Su Shi's brother Zhe(轍, Japanese: Tetsu) and the suffix "ji" (Chinese: 次; pinyin: cì; lit.

Therefore, after submitting his dissertation, Tetsuji started writing and editing his ideal dictionary,"Dai Kan-Wa Jiten"(大漢和辞典).

Completed drafts were waiting for printing in the TAISHUKAN Publishing, but they were burned by the Bombing of Tokyo on 10 March 1945.

The Dr. Tetsuji Morohashi Museum (諸橋轍次記念館) is located in his hometown of Sanjō, Niigata, which is also known as the Kangaku no sato (漢学の里 "Home of Chinese Studies").