Kō Ōtani is 53 years old (birthdate: May 1, 1957).
Ko Ah-seong is 19 years old (birthdate: August 10, 1992).
Ko Soo is 32 years old (birthdate: October 4, 1978).
Ko So-young is 39 years old (birthdate: October 6, 1972).
Matthew Ko is 26 years old. He was born on May 20, 1984.