Kalju Tonuma is an Australian music producer, songwriter, drummer and performer of Estonian descent.

He is one half of the production team MEJU (pronounced "me-you") which he founded with Megan Bernard in 2014.

He also manages record label Of One Kind and live-stream venue The B Side.

[1] Tonuma also performs as the drummer for Anactoria, Megan Bernard and The Indulgence and Peter Farnan and The Home Bodies.

He has been nominated for a number of Australian Recording Industry Association (ARIA) Music Awards.