Ohtsuka gradually incorporated knowledge from Jiu Jitsu, Aikido, and the other karate sensei he trained with, into the classes Funakoshi-sensei had put him in charge of. This included free fighting, and weaving his newfound principles into the kata. While many students agreed with the changes being made, Funakoshi-sensei viewed them as contrary to his teachings. Due to their disagreements, it was in 1930 that Ohtsuka-sensei and Funakoshi-sensei finally parted ways.

Over the 4 years that followed, with help from students who also left Funakoshi