Haruo Oka (岡晴夫, Oka Haruo, January 12, 1916 – May 19, 1970), real name Tatsuo Sasaki (佐々木 辰夫, Sasaki Tatsuo), was a Japanese ryūkōka singer.

At that time, he was encouraged by Taro Shoji in Ginza.

He debuted with song "Kokkyō no Haru" (国境の春, lit.

In 1944, during the Pacific War, he was dispatched to Ambon Island, but soon returned due to sickness.

[1] After the war, his popularity grew, and he starred in Akogare no Hawaii kōro with Hibari Misora.