Most are unaware that there is a difference between Okinawa and Japanese karate, but there is a significant difference in how kata is practiced and perceived and the philosophical purpose of karate. In a Japanese dojo, kata must be exact with no room for variance in stances, there are distinct breaks in timing known as ma, and slow techniques are mixed with fast techniques. In Japanese dojo, students are constantly held in stances during both kihon (basics) and kata practice while the sensei walks around from student to student making minor adjustments to the position of feet, shoulders, knees, wrists, weight distribution, etc. There is also considerable emphasis on deep stances.
Periodically my sensei in kyokushin karate taught some general self-defense, but the applications were never linked to kata. Much time was spent on sparring due to the sport karate emphasis and overall lack of understanding of kata. It didn't take long, but I was bored as we were not learning anything new. All of my Japanese sensei didn’t have much background in self-defense and none had any background in kobudo. Japanese karate focused on winning kumite (sparring) contests and all kata were performed for judges. In the final analysis, these Japanese martial arts were military like with little room for interpretation and an objective to win trophies. They were in direct conflict to philosophies of well-known Okinawan practitioners. Gichin Funakoshi, the father of modern karate, stated, “The purpose of Karate lies not in victory of defeat, but in the perfection of its participants”. Karate was all about improving the practitioner, not winning a competition.