Johann Daniel Busch was the son of organ builder Johann Dietrich Busch. His godfather was organ builder and Schnitger pupil Lambert Daniel Kastens, whose Itzehoer workshop Johann's father took over in 1728. After his father's death in 1753, Johann Daniel continued the workshop. The Busch family's residence was initially at Feldschmiede 27, later at Breite Straße 35 and then 37.

Busch constructed numerous high-quality instruments, mainly in the Duchies of Holstein and Schleswig as well as in the region of Kehdingen. Immediately after his father's death, his mother applied for his father's privilege on his behalf. The two competitors, Johann Matthias Schreiber from Glückstadt and Johann Hinrich Mittelheuser from Wilster, were rejected. On May 4, 1753, at just 17½ years old, Busch received the certificate, thereby becoming a "Royal Danish and Grand Ducal Schleswig-Holstein privileged organ builder for the principalities and counties". In 1754/55, the organ builder traveled to the city of Dresden. Here, on February 2, 1755, he attended the inauguration of the Silbermann organ in the Dresden Court Church. Busch adopted Silbermann's design and disposition principles in his organ constructions at Augustenburg Castle, Trondheim (Vår Frue Kirke), and Sankt Margarethen.

https://de.wikipedia.org/wiki/Johann_Daniel_Busch