Anti-ballistic missiles for defense are very expensive, costing 500 million to 2 billion yen per shot. So the launched ballistic missiles are ignored when it is known by radar that they will land on where damage to Japanese nationals and assets are not expected. Also, the nationwide warning system, (J-Alert) will only issue a warning if it is determined that the missile will enter into Japanese territory or waters. J-Alert will not be used when the missile will fall somewhere in Japan's exclusive economic zone.
