Tetsuo Owada is a Japanese historian and emeritus professor of Shizuoka University. Owada graduated from Waseda University. His work focuses on the studies of history and castles in the Sengoku period of Japan. He is especially famous for his research into the Imagawa clan and Later Hōjō clan. He often works as a historical consultant for the Taiga drama series and makes television appearances on NHK.