[4] In the late 1990s, Kim shot to stardom with voicing Zelgadis Greywords on Slayers and Kaede Rukawa on Slam Dunk.

Since then, he has voiced leading roles in a variety of animated works including Pet Shop of Horrors, His and Her Circumstances, Saiyuki, Fruits Basket, The Prince of Tennis, Detective School Q and Demon King from Today!.

For movie fans, he is well recognized for covering film stars such as Brad Pitt, Christian Bale, Cillian Murphy, Johnny Depp, Leslie Cheung, Matt Damon and Stephen Chow.

Kim also dubbed Saladin on a 1999 South Korean role-playing video game The War of Genesis III.

Because his teaching method is strict, as befits a Republic of Korea Marine Corps background, he is considered a tiger teacher among his students.