Tadao (written: 忠雄, 忠夫, 忠男, 忠生, 忠郎 or 理男) is a masculine Japanese given name. Notable people with the name include:
*, Japanese architect
*, Japanese ''daimyō''
*
Tadao Baba (born 1944), Japanese motorcycle engineer
*, Japanese banker
*, Japanese photographer
*, Japanese footballer and manager
*, Japanese screenwriter and film director
*, Japanese information theorist
*
Tadao Kikumoto, Japanese inventor and engineer
*, Japanese shogi player
*, Japanese footballer and manager
*, Japanese photographer
*, Japanese anime director
*
Tadao Nakamura (born 1947), Japanese golfer
*, Japanese mathematician
*, Japanese footballer
*, Japanese film critic and theorist
*, Japanese musician
*, Japanese astronomer and translator
*, Japanese footballer
*, Japanese mathematician
*, Japanese photographer
*
Tadao Tomomatsu, American actor
*, Japanese diver
*, Japanese long-distance runner
*, Japanese gymnast
*, Japanese anthropologist
*, Japanese politician
*, Japanese economist and academic
*, Japanese sumo and professional wrestler
Fictional characters
*, a character in the manga series ''
Lucky Star Lucky Star, The Lucky Star or Lucky Starr may refer to:
Art, entertainment, and media Anime and manga
* ''Lucky Star'' (manga), a manga, anime, and video game series
* "Lucky Star", one of the Angel Frames from the anime and manga series ''Galaxy ...
''
*, a character in the manga series ''
Ghost Sweeper Mikami''
{{given name
Japanese masculine given names