Heaven and Earth are described as Kenkon in Japanese.

Ken meaning heaven and Kon indicating earth. Heaven is shown as round and earth as square, which symbolises the vastness of heaven and earth.

The badge expresses the harmony of hardness and softness in nature... heaven and earth.

The meaning of Goju is directly related to the badge since this also means hard and soft, Go translates as hard whilst Ju equals soft.

The symbol within the circle is the family crest of the Miyagi family, since the idea of heaven and earth, hard and soft originated with Chojun Miyagi Sensei.