The relationship between ikkyo and shiho nage is a fundamental teaching of the kajos. There are four kajos and this is the first, the next three depend on it, they are subordinate to it. The first kajo is therefore at the beginning of the relationship between all the techniques of Aikido, at the beginning of the riai.
The video here uses the ue kara shita made dynamic (spiral of the hands from top to bottom), starting from a morote dori grasp, to demonstrate the ikkyo movement:
Here I recall what was said in Kajo (correction) #4:
Ikkyo and Shiho nage are each at the head of a technical lineage that they engender:
- Ikkyo is the root of the nikyo, sankyo and yonkyo technical principles of immobilisation, which like him turn from sky to earth.
- Shiho nage is the root of the kote gaeshi, kaiten nage and tenchi nage technical principles of projection which, like him, turn from earth to sky.
These eight principles, antagonistic but complementary, are the eight powers (Hachi Riki).
Whatever the technical form used to perform one of these two techniques (ikkyo or shiho nage), the other is immediately present because it is born of the same spiral and is inscribed in it by the very necessity of the movement.
Every time you do shiho nage, ikkyo is there, and every time you do ikkyo, shiho nage is there. If you want an image, they are two sides of the same coin.
