The kimura from closed guard is one of the simplest submissions in BJJ. It's also one of the most destructive. A whole lot of damage from a position most beginners can get to on day one.
Here's the setup. Your partner has hands on the ground inside your guard. Grab his wrist — you're holding his watch. At the same time, uncross your feet. Reach over his arm with your other hand and grab your own wrist. Thumbless grips on both hands. Thumbs get strained and they get in the way.
Now drive with your legs against the floor to put him face-down. This is the part people rush through. Don't skip the drive. Once he's broken down, start scooting your hip out to the side. Take your top leg and lock it over his back. You can cross your feet for extra security.
Here's the detail that makes or breaks the kimura: you need to be FACING him. Not on your back looking at the ceiling. On your side, facing your opponent. His arm bent at a right angle, elbow glued to your chest. Everything tight. Not loose, not floating — tight against your body.
The finish? Look at the back of his head and push his hand toward it. That's the direction. Toward the back of his own head. And be careful with your training partners on this one. Rotator cuff injuries are real, and big guys with tight shoulders tap late. Go slow.
For the complete kimura system including the kimura trap and positional follow-ups, check out our full kimura technique guide. Get the full course in the BJJ 101 System.