Stage Name: Yoonhak (윤학, ユナク)
Real Name: Jung Yoon Hak (정윤학)
Birthdat… Read Full Bio ↴Stage Name: Yoonhak (윤학, ユナク)
Real Name: Jung Yoon Hak (정윤학)
Birthdate: December 2, 1984 (age 27)
Height: 180m
Weight: 64kg

Jung Yoon Hak (정윤학) is a Korean pop singer and actor.
He is the leader of the boy group Supernova (초신성).
He is currently on hiatus as on December 25, 2011 he started his two year mandatory service. His Japanese solo debut single was released after his enlistment as he recorded it prior to start his service.