demilitarization
Refers to the state or process of removing military forces or weapons from an area, or a policy of not having military forces.
The demilitarization of the area was agreed upon.
noun which may take the genitive case particle 'no'
demilitarized; unarmed
Used attributively with の to describe a place, zone, or person that is free of military forces or weapons.
Unarmed police officers are patrolling.
The establishment of a demilitarized zone was a condition for peace.
Some countries advocate unarmed neutrality.
非武装 means 'unarmed' or 'demilitarized', the direct opposite of 武装 meaning 'armed'.
Compound of prefix 非 (hi-, 'non-') and 武装 (busō, 'armament, armed').