prison gate
Refers to the gate of a prison, especially in historical contexts.
The criminal passed through the prison gate.
decapitation and exposure of the head (Edo-period punishment)
Historical punishment where a criminal's head was displayed at the prison gate or a public place.
In the Edo period, serious criminals were sometimes sentenced to decapitation and exposure of the head.
Compound of 獄 (prison) and 門 (gate). The historical punishment sense derives from the practice of displaying the head at the prison gate.