A drone made mostly from cardboard sounds almost laughable at first. It suggests shipping boxes, school projects, or something that should fall apart in bad weather, not a serious piece of military technology.

But that is why Japan’s cardboard drone story is getting attention. The concern is not that cardboard suddenly became a miracle aerospace material. The concern is what happens when drones become cheap enough to build, transport, and lose in large numbers.

The drone at the center of the story is the AirKamuy 150, made by Japanese defense-tech startup AirKamuy. The company describes it as Japan’s first fixed-wing UAV made mainly from cardboard, with a design focused on low cost and long-distance flight. AirKamuy has also publicly discussed possible roles including training targets, reconnaissance, transport, self-destruct use, and drone swarm applications.

Japan’s military is already paying attention. Defense Minister Shinjiro Koizumi recently met with AirKamuy, and recent reporting quoted him saying the Japan Maritime Self-Defense Force is already using the cardboard drones as targets. That is not the same thing as deploying cardboard attack drones in combat, but it does move the aircraft beyond a simple trade-show curiosity.

One cheap drone may not sound very frightening. A huge number of cheap drones is a different problem. If a drone is inexpensive, easy to produce, and good enough for a narrow mission, it can change the economics of defense.

it can change the economics of defense

Stopping drones can be (very) expensive. A low-cost aircraft can still force an opponent to spend radar time, ammunition, missiles, manpower, and attention. Even if many are shot down, the imbalance may favor the side that can produce and launch them faster.

There is an important caveat. Based on the strongest accessible evidence, Japan has not confirmed that it has adopted or deployed an armed cardboard “suicide drone” for operational combat use. The confirmed story is narrower: AirKamuy built a cardboard fixed-wing drone, the company has discussed one-way and swarm-related uses, and Japan’s Maritime Self-Defense Force is reportedly already using the drones as training targets.

Cardboard drones sound ridiculous. But the point is not the cardboard, it’s scale. A cardboard drone may look flimsy by itself. A huge swarm of cheap drones may pack a considerable punch.

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