Oba Yasumasa was born on November 7, 1972 in Tokyo. In 1993, he joined the Bungakuza Theatre Institute. In 1997, he made his television debut as the love interest of the heroine in the NHK morning drama series “Ama-Kara-Shan.” In March 2020, he left Bungakuza. He has appeared in the NHK Taiga drama “Aoi/Tokugawa Sandai” (2000), the drama “Maison de Police” (2019), the film “Japan’s Longest Day” (2015), the film “Sekigahara” (2017), the film “The Crimes That Bind” (2018), the film “Dance with Me” (2019), and the film “Time’s Journey” (2020).