Sensei Akamine also shared experiences and knowledge with Master Seitoku Higa (1921) founder of the Bugeikan School and with Master Seiken Shukumine (1925-2002) Gensei-ryu karate do and founder of the Taido-Jutsu, both masters were the last students of Master Soko Kishimoto (1866-1945), who had only nine students. The latter can be demonstrated by the fact that Sensei Akamine had incorporated in his own school (Ken-Shin-Kan) katas practiced in the Bugeikan, such as: Ryufa or Rufua; Seisan or Sesan (this last one being very different to the one Master Chojun Miyagi taught) and Ken-Shin-ryu (originally known with the name Kusanku of Takemura). In addition, the contact that Sensei Akamine established with Sensei Seitoku Higa and Sensei Seiken Shukumine, is also reflected in the development in which he derived his training, then incorporating to its Karate Goju-ryu, the techniques of Nage-waza (throwing/takedowns), the techniques of Tobi-gery (flying kicks) and the combinations of legs (kicks), very common to Gensei-ryu Karate and Taido-jutsu style.

        In addition to his training in Karate, Sensei Akamine also learned the art of Kobudo (old martial arts forms that taught the handling of diverse weapons of Chinese origin, such as: Bo, Sai, Nunchaku, Tonfa, Kama, Nunte, Suruchin, etc...) with all the teachers that developed him into a martial artist. However he received the most specialized teachings from the Kobudo master, Shinko Matayoshi (1888-1947), who normally taught at Master Chojun Miyagi’s Dojo. Later on his son Shimpo Matayoshi would impart lessons at Master Seiko Higa’s dojo. Also during his stay in Japan he learned some of the Japanese Budo arts, such as: Kenjutsu; Kendo; Iaido; Judo (of which it incorporated some throwing techniques to complement his Karate) and, Jiu-Jitsu (techniques which are characteristic of the Goju-ryu Ken-Shin-Kan).