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Judo Itsutsu no Kata

Itsutsu-no-kata (五の形, "forms of five")

This summary is mostly from online sources.

is a kata (a set of prearranged techniques) in Judo. It consists of five techniques, known only by their number. Although popular media generally claim that it was developed by Jigoro Kano, recent scientific research has conclusively shown that the kata predates the foundation of Kodokan judo and that Jigoro Kano took it from Tenjin Shinyō-ryū jujutsu and merely imported it into judo after he made minor amendments to it.  The kata is considered unfinished. However, a completed performance version of the kata, expanded to ten techniques, was recently presented under the name Tō-no-kata (十の形, "forms of ten"). The techniques of Itsutsu-no-kata are composed of gentle movements evocative of natural forces.

Techniques

Ichi - direct concentrated energy - direct push

Ni - deflection - avoid and use Uki otoshi

San - circular energy or whirlpool - using form of Yoko wakare

Shi - action and reaction - as the sea sweeps clean the shore

Go - the void - using form of Yoko waker

Kodokan official video below:

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