From the manji to double circles
The central design element, paired circles (so-en) designed to overlap each other, expresses a harmony of yin and yang, of strength and love. The surrounding shields represent the protection of truth, correct teaching, and justice, and the four dots inside the shields represent an Eastern idea of Heaven, Earth, yin, and yang. 
The circle is an expression of the manji in its ultimate form. The manji expresses auspicious beginnings, the root of life, and the flowing universe. Fundamentally, the symbol is used with omote manji and ura manji paired, and it symbolizes harmony. omote manji symbolizes compassion and love, and ura manji symbolizes intelligence and power. In SHORINJI KEMPO, these elements made harmonious and united are regarded as the very core of thought and action in living as a human being, and this is none other than the spirit of riki ai funi.
In SHORINJI KEMPO the omote manji symbol has been attached to the breast of training clothes since the founding. However, in some countries we cannot use the manji, This is because it tends to remind people of the swastika of the German Nazi Party.
Source: Shorinji’s Official Website
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