Tetsuji (written: 哲二, 哲治, 鉄二, 轍次 or 徹治) is a masculine Japanese given name. Notable people with the name include:
Tetsuji Hashiratani (柱谷 哲二) (born 1964), Japanese footballer and manager
Tetsuji Hiratsuka (平塚 哲二) (born 1971), Japanese golfer
Tetsuji Kato, Japanese mixed martial artist
Tetsuji Morohashi (諸橋 轍次) (1883–1982), Japanese lexicographer and sinologist
Tetsuji Murakami (1927–1987), Japanese karateka
Tetsuji Nakamura (中村 哲治) (born 1971), Japanese politician
Tetsuji Shioda (塩田 徹治), Japanese mathematician
Tetsuji Takechi (武智 鉄二) (1912–1988), Japanese theatre and film director
Tetsuji Tamayama (玉山 鉄二) (born 1980), Japanese actor
