Hisao Oma “Isao” Suzuki (鈴木 勲, Suzuki Isao, 2 January 1933 – 8 March 2022) was a Japanese jazz double-bassist.

Born in Tokyo, Japan, Suzuki learned to play bass on United States military bases, and played early in his career with Shotaro Moriyasu, Hidehiko Matsumoto, and Sadao Watanabe. He led his own ensemble in Tokyo from 1965–1969, also performing with Hampton Hawes in 1968. He moved to New York City from 1969 to 1971, playing with Ron Carter, Paul Desmond, Ella Fitzgerald, Jim Hall, Wynton Kelly, Charles Mingus, Thelonious Monk, and Bobby Timmons.