The Azusa Plane was the psychedelic music recording and performance project of Jason DiEmilio (1970 – 2006) of Clifton Heights, Pennsylvania. Performing almost exclusively on a Fender guitar and usually through echo effects, DiEmilio released three full-length studio efforts, a live disc, several EPs and a large number of singles, compilation contributions and split releases between the years 1995 and 2001. The Azusa Plane was the name of the location where the family patriarch dies in the Kurosawa film Ran.

After releasing a cassette on the Shrimper Records label (mainly known for bedroom recordings by songwriters like The Mountain Goats, Sentridoh and others) and a self-released single in 1995, both deeply indebted to the lo-fi drone-rock of Spacemen 3 and the Xpressway label, DiEmilio embarked on a never-completed series of ten split-singles of his own work with that of another like-minded musicians, like guitarists Loren Mazzacane Connors and Roy Montgomery, on his own Colorful Clouds for Acoustics label. His first full-length release, 1997's Tycho Anomaly and the Full Consciousness of Hidden Harmony, released by the Australian Camera Obscura label, was highly regarded for its four extended tracks of drifting, multi-tracked guitar drone and gave birth to a spate of lesser releases and live appearances by a trio formed by DiEmilio with guitarist Jason Knight and drummer Quentin Stolzfus (later of the pop group Mazarin, with whom DiEmilio performed for a short time) who were, at the time, esteemed contemporaries of Philadelphia natives Bardo Pond as well as Windy and Carl and Flying Saucer Attack. A live CD titled The Result Dies With the Worker resulted from these shows.