They will be in Nuneaton, Rugby, Leamington and Stratford.
Following the killing of a 16-year-old boy in Wolverhampton in 2022, Ninja swords will be illegal to own, manufacture or import from 1 August.
Campaigners pushed for tougher rules around owning blades without a practical purpose beyond being used as weapons.
From July until the ban, a Home Office scheme will allow people in Warwickshire to surrender Ninja swords in police stations.
They will be in Nuneaton, Rugby, Leamington and Stratford.
Legally, a Ninja sword is defined as:
“A fixed bladed article with a blade between 14-24 inches (the length of the blade being the straight-line distance from the top of the handle to the tip of the blade) with:
1. A simple straight cutting edge; and
2. A tanto style point.
3. A reversed tanto style point."
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