Sadao Watanabe (渡辺 貞夫, Watanabe Sadao?) (born February 1, 1933) is a Japanese musician who plays the alto saxophone, sopranino saxophone and flute. He is known for his bossa nova recordings, although his work encompasses a large range of styles with collaborations from musicians all over the world. He has had 13 albums reach the top 50 billboard charts and 2 within the top 10. He has also had numerous albums reach number one on the jazz charts. Among his more prestigious awards are the Order of the Rising Sun, the imperial medal of honour for his contribution to the arts, numerous cultural awards from around the world, the Fumio Nanri award and his cities first honour award.