Knee joint
Bilateral lower-limb joint target; right representative
The knee joint is retained as a lower-limb structural target in the judo-jujutsu self-defence vocabulary, where atemi supports control and escape context. This point uses the anatomical-right knee as the normalized front-view representative for a bilateral target; no historical source supplies the x/y coordinate or a single canonical spot on the joint. It is a descriptive lineage marker, not a technique instruction.
Point 12 of 12 in Atemi-waza — Judo-Jujutsu Vital Strikes
Cross-tradition overlaps
No overlapping points are registered for this point.
Sources
Kodokan Judo Institute, Goshin-jutsu (primary_canonical)
The Goshin-jutsu technical specification, in its lower-body unarmed attack-and-defence series, documents the knee/lower-limb target line represented here; the normalized coordinate is editorial.
Jigoro Kano, Kodokan Judo (primary_canonical)
Kano’s Kodokan Judo, in its discussions of kata and self-defence, documents atemi as an auxiliary striking element within judo’s broader throwing and control curriculum; it does not supply the normalized body coordinate used here.
Zen Nihon Jujutsu technical manuals (secondary)