To explosive_power: You have trained Shotokhan so here i just talk about Kyokushin Karate. Kyokushin and Shotokan both are big kind of Karate of Japan. But each other to different. Kyokushin has been called Full contact by American. It true as it name. In Old Kyokushin you can do everything you trained in a Kumite competition even elbow, knee, fingers... Punches and kicks are so simple, useful and power. It has a few of Kata but you must do each Kata lesson about 1000 to 3000 times before do the next... PS: You do Shotokan in yellow belt, i thinks that not enough to you to understands what is the Shotokan Karate. I thing you should do it until you get a black belt and you can do some another kind of Karate you want. However good luck with Karate.