Cho began learning
Go at the age of four and passed the test for becoming a professional in 1962. In 1963, Cho was invited to Japan. Originally intended to study under
Minoru Kitani,
Kensaku Segoe took Cho under his tutelage. Segoe was responsible for bringing
Go Seigen to Japan and also teaching
Utaro Hashimoto, founder of the
Kansai Ki-in. Cho was considered a 2 dan professional in Korea, but was demoted to 4 kyu upon arriving in Japan. In 1980, he held nine titles simultaneously:
Guksu,
Myungin,
Wangwi,
Kisung, Paewang,
Kiwang,
Daewang,
Jaewang and the
Baccus Cup. Cho repeated this twice, in 1982 and 1986, winning ten and eleven titles respectively. Despite winning several titles, Cho wasn't considered the best Korean player at the time. Instead, the media favored
Cho Chikun, a Korean-born 9 dan professional in Japan. In 1980, Cho Chikun visited South Korea after winning the
Meijin title and the two began a friendship match consisting of two games. The two game series was played on 31 December 1980 and 2 January 1981 with Hunhyun losing both games. From 1991 until Hunhyun's loss in the 8th
Samsung Cup in 2003, Cho Hunhyun didn't lose a match to Cho Chikun. == First Korean 9 dan (1982–2004) ==