Japanese engineers used traditional measurement units, such as the Shaku (roughly one foot) or Ken (roughly six feet), often coded into numerical symbols.
Cyanide capsules, arsenic powders, and quicklime were frequently placed inside or around the treasure crates. When exposed to air or moisture, these substances release lethal gases. yamashita treasure signs and symbols pdf 198
Once a seeker locates the exact zone, specific signs dictate how deep to dig and what volume of treasure to expect. Japanese engineers used traditional measurement units
. Engraved dots inside can specify the direction or exact location relative to the marker. Animal Figures yamashita treasure signs and symbols pdf 198