Tatsuo (written: 龍夫, 龍雄, 龍生, 龍男, 竜夫, 竜雄, 竜男, 達夫, 達雄, 達生, 達男, 達郎, 辰夫, 辰雄, 立郎 or 剛男) is a masculine Japanese given name. Notable people with the name include:
Tatsuo Endo (遠藤 達雄) (1925–1989), Japanese engineerTatsuo Fujimoto (藤本 達夫) (born 1940), Japanese swimmerTatsuo Hasegawa (長谷川 龍雄) (1916–2008), Japanese automotive engineerTatsuo Hirano (平野 達男) (born 1954), Japanese politicianTatsuo Hori (堀 辰雄) (1904–1953), Japanese writer, poet and translatorTatsuo Inagaki (born 1962), Japanese artistTatsuo Itoh, American academicTatsuo Jihira (地平 達郎) (born 1948), Japanese water polo playerTatsuo Kainaka (甲斐中 辰夫) (born 1940), Japanese judgeTatsuo Kamon (嘉門 達夫) (born 1959), Japanese singer-songwriterTatsuo Kawabata (川端 達夫) (born 1945), Japanese politicianTatsuo Kawai (河相 達夫) (1889–1965), Japanese diplomat and writerTatsuo Kinoshita (木下 達生) (born 1987), Japanese baseball playerTatsuo Kobayashi (小林 龍生) (born 1951), Japanese computer scientistTatsuo Kondō (近藤 龍夫) (1916–1992), Japanese photographerNagai Tatsuo (永井 龍男) (1904–1990), Japanese writerNishida Tatsuo (西田 龍雄) (1928–2012), Japanese linguistTatsuo Sasaki (佐々木 竜雄) (born 1942), Japanese sport wrestlerTatsuo Satō (director) (佐藤 竜雄) (born 1964), Japanese anime directorTatsuo Sato (politician) (佐藤 剛男) (born 1937), Japanese politicianTatsuo Shimabuku (島袋 龍夫) (1908–1975), Japanese karatekaTatsuo Suzuki (鈴木 達夫) (born 1935), Japanese cinematographerTatsuo Utagawa (宇田川 竜男) (born 1917), Japanese ornithologist and academicTatsuo Watanabe (渡部 龍雄) (born 1928), Japanese ski jumperTatsuo Yada (矢田 立郎) (born 1940), Japanese politicianTatsuo Yamada (山田 辰夫) (born 1956), Japanese actorYamamoto Tatsuo (politician) (山本 達雄) (1856–1947), Japanese politicianTatsuo Yoshida (吉田 竜夫) (1932–1977), Japanese illustrator and character designer