Shinzu,
Sorry sir, but you are in error. After the occupation Native Korea arts such as SipPalGi, Sado MuSool, etc. and Sino-Korea arts such as SorimJangKwan and Sorim, were banned. The first school identifying itself as TangSooDo, which is a Modern term according to linguists, opened up in 1944 under the direction of Yi, Won Kuk. (Which was also approved and overseen by Govornor Abe, leading to the conclusion that Master YI was a Japanese sympathizer and causing him to leave the country. This is why there was a president of the CDK and a succession before he passed away.) This was the ChungDoKwan. Kwon Bup and the like all came about, and there is some dissention here, around the same time. Bear in mind that Kwan Bup means the same thing as Ch'uan fa, so it may be a Korean art, which exemplified the characteristics of Ch'uan fa and was so named in its honor, or it could be an actual Sino originated art.
1. Yi, Won-Kuk openly admitted that his art was originally Okinawa-te, and if you look at Duk, Son-Song's technique who teaches in NYC and was the second head of the CDK, you still see this.
2. Hwang Kee, whom most people consider the founder of Tang Soo Do and Moo Duk Kwan, openly admitted in his history about studying books on Japanese Kata.
3.TangSooDo is a literal translation of the original Karate-Do and further KongSooDo, used be a kwan or two, is the transliteration of the newer Zen influenced name.
4. TangSooDo bears no resemblance to arts such as Taekyun, which is still taught today by the Korea Taekyun Association, which in my mind, as I have seen it but decided not to try it, reminds me somewhere between a dance and hackey-sack. It appears to be VERY fluid.
5. With the exception of the Chil Sung hyung, Hwa Sung, Hwa Rang and the Yuk Ro, the remainder of the hyung typically practiced in TangSooDo are from the Okinawan/Japanese traditions, and further in some cases bear names almost identicial and in fact are simple transliterations: Pinan, Pyung Ahn, Bassai, Passai and so forth. This was also the driving force behind the development of the ChungHan Hyung and later the Palgwe, which are officially replaced by the Taegeuk. The actualy reason given by the Koreans at the time was that they were too Japanese and wanted to better typify Korean thought and martial culture.
Shinzu, these are facts which I have learned over the last couple of decades and are readily available to anyone. I ahve personally, as a TangSooDo Kodanja been to a Shotokan school in Richmond, VA (Dai Ichi Shotokan) and fit in perfectly save the fact I have a midnight blue belt and they wore black. What you are proposing has already been argued and been found to be untrue. I myself 15 years ag had a similar position and thourhg research found that position to be erroneous. I'm sorry but it is true. TangSooDo was originally Japanese, or atleast what we have in Korean arts was. Now there are legends about various forms being taken to Japan by the chinese, Kong San Kun (Kusanku) being one of them. The Kicho however are purely Japanese as they evolved from Itosu's teaching.