This in turn caused many of the more advanced students and/or those who considered themselves closer to Miyagi Sensei, make claim the right to occupy the leading position to drive the future of Goju Ryu as special heritage of each;4 and if it is true that one of them had more than enough capacity to do so, the fact remains that the only Miyagi sensei had expressed publicly, a marked preference for his disciple named Jin'an Shinzato.5 With no defined command structure in Miyagi sensei’s dojo, after his death, only a few of his former students continued to attend the dojo of his master. Others maneuvered to appear before the younger practitioners and supporters of karate throughout the world as the legitimate successor of Miyagi Chojun Sensei. After more than 20 years of painstaking research, and by divine coincidence, the author of this work has been able to establish a reasonable theory of "inheritance" left to Goju ryu by Miyagi.
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4 The classmate and friend of Miyagi Chojun called Kyoda Juhatsu, was senpai of Miyagi Chojun from 1902 to 1915, and after the death of Higaonna Kanryo, remained under his direction until 1932. At the moment of Miyagi's death, Kiyoda was not in Okinawa as he had left to Kyushu in mainland Japan in 1944. Kyoda maintained friendship with Miyagi although this was removed in 1934 because he had decided to name their school in honor of Sensei Higaonna Kanryo (Toon ryu karate or karate Higaonna's style) and considered that Miyagi had not put a name without reference to master of both (as did Mabuni Kenwa, another student of Higaonna who was a classmate of both). 5 At 44 years old, he died in 1945 in the northern part of Okinawa, hit by a bomb splinter during softening operations to Japanese forces stationed in the island of the Pacific archipelago (Ryu Kyu).
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3 50 Years of Soke Sakamoto Tameyoshi Teachings
Takayoshi Sichiyama Alvarez (Takayoshi Sakamoto)
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A) If we use as our base the premise that Miyagi's successor should be the oldest active student, who has the appropriate experience until the day of his death, desire to serve others and with sufficient teaching skills, then it would be necessary to decide (in Okinawa) between Seiko Kina, Iha Koshin, Yagi Meitoku, Higa Seko and Miyazato Ei'Ichi. Outside Okinawa the sole candidate would be Yamaguchi Gogen Sensei, who in 1930 had founded a dojo in Kyoto for the practice of Goju ryu, and since then had not stopped teaching this style of karate which was working (Manchuria, Mongolia, Kagoshima, Tokyo, etc.). Unfortunately Okinawan official records were destroyed during the Second World War and have no trustworthy information at hand about which one had in those years a real student body with enough organizational structure to enforce
their desires to direct the future of Goju ryu in the ideals of Miyagi sensei, and was also certified as such by some government agency or government office as the Dai Nippon Butokukai in Okinawa, was closed by the U.S. and allies after the WW II. B) Starting from the premise that Miyagi's successor should be the one who had acted as his assistant longer time after the Second World War (being from those years when it expanded worldwide on Goju Ryu), which also was considered in charge of the Miyagi's
dojo for over three years and also by many of the older students, close to the daily life of Miyagi sensei... that successor would be Miyazato Ei'Ichi
sensei.
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Teruo Chinen (2011) →  Yamaguchi sensei (1954) C) Based on the reputation, development and expansion given to Goju Ryu in Japan, Okinawa and the west, after World War II, we should choose the successor of Miyagi Chojun from: Yamaguchi Gogen (Japanese Goju Ryu), Toguchi Seikichi (Shoreikan), Yagi Meitoku (Meibukan) and / or Miyazato Ei'Ichi (Jundokan). After 1979 we have to bow to the excellent work carried out by Morio Higaonna and Chinen Teruo (founders of the International Okinawa Goju RYU Karatedo Federation –IOGKF-). D) If we take the hypothetical case (but not impossible) that Miyagi Chojun sensei had decided to transfer all his secrets, and left as heir to his style of karate, his latest and younger uchideshi, almost 23 years of age when Miyagi died, and just about five years of practice, then the heir of Okinawa Goju ryu karate-do would be Miyagi An'ichi.