Shizuo (written: , , , or ) is a masculine Japanese given name. Notable people with the name include:
*, Japanese immunologist
*, Japanese sumo wrestler
*, Japanese writer
*, Japanese printmaker
*, Japanese aikidoka
*, Japanese-born American mathematician
*, Japanese footballer
*, Japanese pole vaulter
*, Japanese sumo wrestler
*, Japanese footballer and referee
*, Japanese shot putter
*, Japanese sport wrestler
*, Japanese general
{{given name
Japanese masculine given names