Keisuke Sagawa (砂川 啓介, Sagawa Keisuke; February 12, 1937 – July 11, 2017) was a Japanese actor and tarento. He is notable for being the first actor of the Taisō no Onīsan in the Uta no Ehon program on the long-running television program Okaasan to Issho. His wife was actress, television personality, and voice actress Nobuyo Ōyama.
Source: “Keisuke Sagawa”, English Wikipedia (CC BY-SA 4.0), excerpt