Choo Sung Hoon's father has passed away.

On April 18, Choo Sung Hoon's agency stated, "Choo Sung Hoon's father Choo Gye Yi passed away today at the age of 73." It's reported Choo Sung Hoon returned to Japan immediately after hearing of his father's passing. 

Choo Sung Hoon's father is known for his appearances on KBS' 'Superman is Back' with his son and granddaughter Sarang.

Condolences to Choo Sung Hoon and his family.