Japan is now using very cheap cardboard drones built for large group attacks and missions where they can be lost after use. The main body is made from thick cardboard with a water-resistant coating. Each one costs about 2,000 to 2,500 US dollars, lower than many home gaming computers. The drones come flat like folded boxes, so many can ship in one big container. Anyone can assemble one in about 5 minutes with no special tools. >The drones can fly up to 150km at speeds between 45 and 120 kmph. >They stay in the air for one to 2 and a half hours and can carry small items like cameras or tools to block enemy signals. Japan can build and deploy hundreds quickly. The cardboard also makes them harder for enemy radar to detect. The low price means the drones do not need to return safely and work well for training, decoys, scouting, or swarming enemy defenses. Japan is investing more in these simple, mass-produced drones. One 2,000-dollar drone can force an enemy to waste a much costlier missile.