趙治勲
In April 2017, Cho Chikun became the first Japanese player to record a 1500 official wins. His 1500th victory came from the second round of the 7th Igo Masters Cup where he beat Satoshi Kataoka. His record was 1500 wins, 821 losses, 3 draws, and 4 no-results, for a winning percentage of 64.6%. Cho was 60 years ten months at the time and it took him 49 years to achieve the record.