Jason Willett is an American musician, known largely for his work with experimental rock groups including Half Japanese, Can Openers, Pleasant Livers, X-Ray Eyes, The Dramatics, The Jaunties, The Attitude Robots, Leprechaun Catering, and many more. His record label, Megaphone, initially set out to issue work by punkish Rock in Opposition-derived performers like The Work, Fred Frith, the Molecules, Matmos, Tim Hodgkinson and Jac Berrocal but became largely a venue for Willett's own collaborative music. He has also made records with Ruins, Jac Berrocal, James Chance, Jon Rose, Michael Evans, Ron Anderson, Benb Gallaher, Mick Hobbs, Chris Cutler, Little Howlin Wolf, Yamatsuka Eye & his various pet ducks.

The son of songwriter Fangette Willett (whose work includes Tammy St. John's "Dark Shadows and Empty Hallways" and Walter Jackson's "It's an Uphill Climb to the Bottom"), Jason Willett was raised in a musical household in Maryland. After being drafted as bassist for Half Japanese in 1990, he has retained a collaborative relationship with Jad Fair, with whom he has produced 14 collaborative duo releases (at least 2000 songs still unreleased).