國立臺灣大學醫學院附設醫院
Ku was diagnosed with cancer in 2014 and died of plasma cell leukemia on 25 May 2016 at National Taiwan University Hospital in Taipei. Aged 56 at the time of his death, Ku is survived by his wife and two children. His daughter, Ku Yun, was a member of the girl group Ice Creamusume from 2008 to 2010.