Tibial periosteum
Anteromedial shin landmark
The tibial periosteum is the sensitive covering along the subcutaneous anteromedial border of the shin. The diagram places it as a long-bone surface landmark; it does not imply that impact there has a standardized meridian effect or that intentionally injuring it is safe.
Point 12 of 13 in Kyusho-Jitsu — Okinawan pressure-point karate
Cross-tradition overlaps
No overlapping points are registered for this point.
Sources
George Dillman / Koszewski lineage, Advanced Pressure Point Grappling (primary)
Primary modern source for shin target terminology in the Kyusho-Jitsu frame.
Nakamoto Masayuki, Okinawan Kyusho lineage (secondary)
Secondary Okinawan lineage context for lower-leg targets.