Bruce Lee might be dead, but his spirit is very much alive in this little boy from Japan ... who knows one of the legend's insane nunchuck movie routines like the back of his hand.
Meet Ryusei -- a legitimate Kung Fu prodigy who's obsessed with all things Bruce ... including his famous fight scene from "Enter the Dragon," where he's swinging around the chucks like the master martial artist he was. Turns out, Ryusei wasn't too far behind him .... at age 5!!!
The clip you see here was shot a while ago, but it shows the kid with his back turned to the movie playing in the background.