I am not the originator of the phrase or concept of “micro jiu jitsu”, but as I’ve come to understand it, I am a huge proponent. What is micro jiu jitsu as I understand it? In every technique, move, or sequence thereof, there are always one or two small details that everything else hinges upon. Get these details correct and your technique will be unstoppable. Neglect these details and you will either fail all together or be forced to muscle the technique to complete it.
An example of an individual detail that will make or break your chances of succeeding might be the initial cross collar grip when setting up the cross collar choke from closed guard or the scissor sweep. Once you reach for that collar a good opponent will work to break the grip and/or prevent you from improving it. So, developing a method for getting that initial grip deep is crucial. If you use your left hand to pull the collar while sliding your right hand in for the grip, the coordination between your two hands and getting the timing right needs to be refined to the point where it becomes automatic. Once you have the grip, understanding the nuances of the grip (do you curl the wrist? Flare the wrist? Do you grab just the collar or do you grab a handful of extra materiel? etc.), is equally important. Something as simple as this single grip can be explored and improved upon for many years.
A few other examples: If you like the kimura and hip bump sweep then the initial move to dominate and secure your opponent’s arm might be that key detail that everything else hinges on. If you like the armbar from closed guard or the flower sweep (pendulum sweep) then getting your opponent’s elbow across the center line while controlling the arm and moving your hips to create the right angle might be the key detail. I don’t presume to be enough of an expert to identify definitively what the key detail is for every move/technique, but I am sure that each athlete (perhaps with help from a coach or teammate) can identify key details to master based on their favorite go-to moves.
Not only can you improve the rate at which you succeed when executing individual techniques by mastering micro jiu jitsu it can also be the foundation to building your own grappling “system”. I often see people who prefer the cross-collar choke from the guard, knee on belly to kimura from side control, and the armbar from mount. If you like the cross-collar choke from guard, why not also make that your go to move from mount and maybe consider knee on belly to baseball bat choke (similar to a cross collar choke) from side control. You can also use the cross-collar grip from standing for throws or takedowns. That way, you get a little better at one thing (getting that grip and getting it right), and your game gets better from almost every position.
This, to me, is the essence of training “smart”. There’s no way one person can master every technique there is in jiu jitsu…. why not work on the ones that have some basic fundamentals in common and master those fundamentals?
Train hard. Train Smart. Get better.