In October 1950 Sensei Akamine participated in a demonstration of Karate-do in Tokyo. This event was organized by the Japanese TV Nipon, which marked the reactivation of Butokukai (Association of the Japanese martial arts virtues) which had been in recess during and after World War II.
Note: an article written in Portuguese extracted of the Web site of the Genseiryu – Nanbeikai-Dojo-Brazil and the Web site of the Portuguese Association of Taido:

       7. Em Outubro de 1950 Seiken Shukumine participa numa demonstração de Karate organizada pela Nippon TV. Nesta demonstração participam também Hidetaka Nishiyama (JKA), Ryusho Sakagami (Itosu-kai), Yasuhiro Konishi (Ryobu-kai), H. Kenjo (Kenshu-kai), Kanki Izumikawa e Shikan Akamine (Goju-ryu). Shukumine executou kushanku dai, tameshiwari (teste de quebra, partindo 34 telhas com shuto) e hachidan geri (8 pontapés no ar). Neste ano cria a kata Sansai (pertencente ao Gensei Ryu) que inclui pela primeira vez as técnicas: Sentai katana-uchi, Hentai manji geri e Hentai ebi geri.

       In 1957 Sensei Akamine immigrated to Brazil looking for a better future for his family and to spread the martial arts. Settling in Sau Paulo, he established a Dojo with more than 1000 students (1964). The school was named the Brazilian Association of Karate-Do (BAK). Later, this Association failed and Sensei Akamine created a new school; the Ken-Shin-Kan (1968). In that year, Roberto Fernández de la Reguera travelled from Chile with the aim of inviting Sensei Akamine to Chile to establish a school. Sensei Akamine stayed a month in Santiago, Chile (1969) teaching intensively those who from then on, would be his representatives in Chile, the brothers Roberto and Raúl Fernández de la Reguera.


Sensei Raúl Fernández de la Reguera, Sensei Seiichi Akamine and
Sensei Roberto Fernández de la Reguera, in Santiago of Chile (1979)

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