Jose Mangual. Juana Díaz, Sr. (March 18, 1924 – September 24, 1998), known as Buyú, was a Puerto Rican percussionist.

Mangual already showed the qualities of a professional percussionist at the age of ten. In 1939 he went to New York with his family and initially performed in small clubs. His musical career began in 1942 when Chino Pozo and Tito Puente left Machito’s orchestra and he replaced them on timbales and Pilidor Allende on bongos. When Puente returned a short time later, Allende switched to the conga and Mangual to the bongos.

During the eighteen years that he was a member of Machito’s Afro-Cuban All-Stars, he toured internationally, performed with musicians such as Stan Kenton, Dizzy Gillespie, Buddy Rich, Flip Phillips and Charlie Parker, and acted on more than three hundred recordings the group with. In 1959 he parted ways with Machito to perform with flutist Herbie Mann. He has also toured Africa with Carlos Valdéz and backed Abbie Lane and Nancy Ames.

Through Valdéz he met the pianist Erroll Garner, with whom he performed in Europe and the USA. After his death, he became the star of New York’s Cheveré Social Club. Other musicians with whom Mangual has performed throughout his career include Eddie Palmieri, Chico O’Farrill, Cal Tjader, the Count Basie Orchestra, Sarah Vaughan, Dexter Gordon, Cachao, Ray Charles and Tito Rodríguez. In 1977 his only solo album entitled Buyú was released. Mangual had six children, of whom sons José Jr. and Luis also became known as musicians.