So, I am a 2nd degree in Isshinryu Okinawan Karate. I am currently not associated with any groups of Federations, etc. I am looking to start teaching on a small level.
let's also say, that there are some changes I want to make to the way I am going to teach the style. I think Isshinryu packs way too much information and memorization in between white belt, and black. I think that it can be overwhelming, and I think that most students today do not have the time to dedicate to the amount of Katas, and techniques that normally are taught in Isshinryu under black belt.
I want to slow down the learning a bit. As you may not know, Isshinryu starts with Seisan, while not an overly complicated kata, it is lengthy. Many schools have added introductory katas such as Taikyoku, or other various beginner Katas. I would like to add the 2 Fukyugata katas from Matsubayashi. One being from Shorin Ryu, and one being from Goju (the core systems that Isshinryu is taken from).
Also, traditionally you learn all 8 katas in the system before black. That includes Kusanku, and Sunsu (the longest). I am thinking of moving these to 2nd, and 3rd dan respectively.
There are 3 Bo katas in this sytem, I am wanting to add an intro kata (Tenryu No Kon). There are also 2 Sai katas. I am thinking of removing them all together as they are expensive weapons for families to buy, and they are very dangerous with the sharp points. I do not think kids should learn them.
Here is my question: If I make all these changes, am I still teaching Isshinryu? Is this now a new system, or a modified Isshinryu system.
What do you think. I think people are making changes to systems all the time, when does it stop being the parent system?
I am an Isshin-Ryu karateka, and we do not learn the katas in the order you mentioned. My first kata was Sanchin. Second was Seisan, then Seiuchin. Now I am working on Naihanchi, to be followed by Wansu.
I am currently a go-kyu, wearing a green belt. When I have six months as a go-kyu and both Naihanchi and Wansu, I may be promoted to blue belt. I will need six more months and Chinto to be promoted to Brown belt. I will also have to become proficient in learning the 'backside' of the katas, so that I can be a good uke for those learning the katas.
My dojo is affiliated with the UIKA, and my sensei's teachers are Master Harrill (RIP) and Master Mitchum. My sensei learned from the men who learned from Master Shimabuku personally, and he is in constant contact with Master Mitchum, so I don't think what he teaches is inauthentic in any way, although the order in which he teaches kata differs from other Isshin-Ryu dojos in the area, as does his promotion criteria.
Given that I started training at age 47, I cannot advance realistically past say San-Dan in my ifetime, given the years left to me and the promotion criteria for time in active MA training and time in each grade. I expect to be a brown belt until I am nearly 60. That's life, I can deal with it, I'm not interested in collecting belts, but in proficiency.
So I don't think what you're doing would necessarily be changing the system. We also do Taikyoku, but I'm not very good at it yet, and yes, I realize it's not part of Isshin-Ryu. We also learn techniques in our self-defense portion of the training that are not Isshin-Ryu, just techniques that our senseis like and want us to learn.
For what it may be worth, and no disrespect intended of course, but at our dojo, you would not be teaching at all. Only San-Dan and above are called 'sensei' and teach. And only Yon-Dan and above - with special permission if not at least Go Dan, would be given leave to open their own dojo. Start to finish in our system, Go-Dan would take a person about 30 years from white belt, on average (a guess, not a hard and fast rule). Our sensei is 57, has 40 years in, and he's Hachi-Dan. His two main students are both Go-Dan, and have 35+ years in of active training.