Kotaro, Kōtarō or Koutarou is a masculine Japanese given name. Notable people with the name include:Kotaro Azuse , Japanese baseball player Kotaro Honda , Japanese scientist and inventor Kōtarō Iizawa , Japanese photography critic and writer Kotaro Ikeda , Japanese painter Kōtarō Isaka , Japanese writer Kotaro Koizumi , Japanese actor Kotaro Nagasaki , Japanese politician Kōtarō Nakagawa , Japanese composer and music arranger Kōtarō Nakamura , Japanese general Kotaro Nakao , Japanese footballer and manager Kotaro Omori , Japanese footballer Kotaro Oshio , Japanese guitarist Kotaro Otake , Japanese baseball player Kotaro Sakurai , Japanese racing driver Kōtarō Satomi , Japanese actor Kotaro Shimizu , Japanese hurdler Kotaro Shimomura , Japanese chemical engineer Kotaro Suzumura , Japanese economist and academic Kōtarō Takamura , Japanese poet and sculptor Kotaro Tamura , Japanese politician Kōtarō Tanaka (judge) , Japanese jurist and politician Kōtarō Tanaka (photographer) , Japanese photographer Kotaro Uchikoshi , Japanese video game director and scenario writer Kotaro Umeji, Japanese graphic designer Kotaro Yamazaki , Japanese footballer Kotaro Yanagi , Japanese actor Kotaro Yatabe , Japanese rugby union player Kōtarō Yoshida , Japanese jujutsuka