Kaz Hayashi
In 2002, Yun joined All Japan Pro Wrestling where he wrestled as both a part of its tag team division and its singles junior heavyweight division. On April 13, 2002, Yun, competing as Yang, teamed up with Kaz Hayashi and Hi69 to defeat Kazushi Miyamoto, Gran Naniwa, and Ryuji Hijikata. On July 17 on an AJPW pay-per-view, Yang teamed up with Hayashi and George Hines to defeat Ryuji Hijikata, Gran Naniwa, and Johnny Smith. Over a month later, Yang returned to AJPW on August 31, teaming with Masaaki Mochizuki and Dragon Kid to defeat Magnum Tokyo, Susumu Yokosuka, and Darkness Dragon. Yang suffered his first loss in AJPW on September 15, when he and Kazushi Miyamoto lost to Kendo Kashin and Robbie Brookside, although that same month he teamed with Kaz Hayashi to win the Real World Junior Heavyweight Tag Team League. The following month, Yang defeated Gran Hamada and Gran Naniwa in a three-way match, before he and Yoji Anjoh lost to Mike Barton and Jim Steele. Throughout the end of 2002, Yang continued competing in six-man tag team matches, with mixed results.