DK Yoo was born in Toronto, Ontario. Yoo has practiced over 15 martials arts:
- Boxing
- Savate
- Taichi
- Aikido
- Sanda
- Wu Shu
- Shaolin Kung Fu
- Systema
- Eskrima
- Wing Chun
- Judo
- Jeet Kune Do
- Kick Boxing
- Myanmar Lethwei
- Taekwondo
- Tong Bei Quan
- Taekkyeon
- Baji Quan
- Fencing
He has given seminars to Korean SSAT and SWAT. Here is some parts of his seminars.