The veteran musician passed away after prolonged illness at his residence here in Chowkaghat.
Yadav, who was famously known as 'Birha Samrat', was undergoing treatment at a city hospital and was discharged on Saturday.
He took his last breath this morning, said a family member.
"Deeply saddened by the news of the demise of Padma Shri awardee Birha Samrat of Varanasi, Shri Hiralal Yadav. I had enquired about his health two days ago. His demise is an irreparable loss to the field of folk music. My thoughts are with his fans and family in this hour of grief," the PM tweeted.
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