Does striking experience help one learn to grapple? Not at first. Like I said in “Part I”, the sensory adjustment that you go through is difficult. Grappling is more tactile and striking is more visual. After the adjustment, there are things that do transition over from striking to grappling.
To answer the question, I have to break down the striking arts into motions. There are angular motions, linear motions, and circular motions. Most striking arts use all of these motions. However, individual styles of striking arts will use one motion more than the others. There are linear motion based martial arts such as Tae Kwon Do. There are circular motion based martial arts such as Wushu. Then there are angular motion based arts such as Wado Ryu Karate.
Angular motion based martial arts systems like the Wado Ryu that I studied use a lot of angles. The angle is a very strong architectural element. Look at the Egyptian Pyramids. Wado Ryu has very strong blocks that can double as strikes. It also has very strong stances. My son Joe at 16 was able to knock down a TKD black belt (20 years experience) using a Wado Ryu block with a Wad0 Ryu stance. Some BJJ sweeps and holds use angles. The karate also comes into play in the foot work required for take downs. Those strong stances are very similar to some of the foot positions used in take downs.
When you look at the founder of Wado Ryu, the relation between it and BJJ becomes more clear. Hironori Otsuka was the nephew of a samurai. He began studying Traditional Jiu Jitsu under that uncle at the age of five. He also studied Shotokan Karate under Gichin Funakoshi. Eventually Otsuka combined Traditional Jiu Jitsu with Shotokan Karate to create Wado Ryu.
From that perspective, one could consider Wado Ryu and Brazilian Jiu Jitsu siblings of a sort. Some of the joint locks used in Wado Ryu are used in Brazilian Jiu Jitsu. One such lock is the Kimura. But don’t forget the horizontal vs vertical complication. When you do a submission standing up, you have two base points that you always use. They are called your left foot and your right foot. When you are rolling, any combination of body parts could become base points. So, your two-dimensional puzzle (vertical) becomes a Rubic’s Cube (horizontal).
Like I said in the beginning. These are not easy questions to answer. There is more information, but that would be too over whelming to dump it all out there at once. I’ll be spewing my non-sense about linear motion based martial arts next.