Police in Tokyo are to introduce interceptor drones with nets to catch suspicious drones in sensitive areas.
The move will be a first in Japan, which tightened drone regulations after one was found on the roof of the prime minister's office in April carrying a small amount of sand contaminated with radiation.
The interceptors, dangling a rectangular net and equipped with a camera, will only be deployed against suspicious drones after attempts to locate and warn their operators.
The latest regulations ban drone flights near airports, in densely populated areas and anywhere more than 150m off the ground.