[5][6] Yune practices many forms of martial arts,[6][7] but he excels in Taekwondo (in which he holds a black belt) and Boxing (he is a former Golden Gloves boxer).

[5][6][9] Yune made his film debut in 1999, playing Kazuo Miyamoto, a Japanese-American war hero accused of killing a respected fisherman (played by Daniel von Bargen) in the close-knit community, in director Scott Hicks' film adaptation of David Guterson's post-World War II novel, Snow Falling on Cedars.

[5][6][9] Yune co-starred as Johnny Tran, a Vietnamese gang leader and the rival of Vin Diesel's character, in the 2001 film The Fast and the Furious.

Yune appeared in two 2005 episodes of ABC's spy series Alias, playing a modern-day samurai Kazu Tamazaki who is hunted down by Jennifer Garner as Sydney.

[12][13] In 2013, Yune played Kang Yeon-Sak, a North Korean ultra-nationalist and ex-terrorist mastermind who plans a terrorist attack on the White House, in the action thriller Olympus Has Fallen, opposite Gerard Butler.