  After a short review of basic biomechanics of Seoi Family and their
characteristic, two fast survey of Seoi in judo books and in worldwide
researches are performed. The lot of information collected around the world
flow into the competitive application of this family (in Japanese view) or in
the most energy convenient technical variation (in Biomechanical view) with the
study of the last new solution or variation applied. An analysis of
complementary tools utilized for each component of the Family to increase their
effectiveness or refine their application to Ippon follow. Till to the new ways
Chaotic applications based both on totally rotational application or reverse
application of Seoi Lever System, with the conclusion at the end by a brief
overview of Physical and Biomechanical framework connected to Seoi Family, with
a more extended study of interaction ( Seoi application to throws). Conclusion
is presented with a comparative evaluation of some remarkable properties all
applicable competitive Seoi techniques useful both for coaches and teachers
