Hi Molefi check my reply to Kato= it will give you some info. If you need to know more let me know = I cannot translate the Japanese but can help with some general info
Kato it is shotokan karate in the main dojo of the japan karate association = tbe " JKA*. It is just a form of free fighting = that is less formal and they can try any technique, combination. Only reason why it is a bit ruff is because it is a senior instructor probably training with one of his dedicated students. Nothing new we do it every week in our dojo. There is no such thing as shotokan full contact.