In another downside to rapidly graying Japan, the nation's active hunters — in decline and aging — are having a hard time keeping up with their hunting dogs that dash after their prey.

That's a big headache for prefectural governments nationwide that need hunters to go after deer, boars and other animals that cause extensive crop damage.

The small mountain town of Naka, Tokushima Prefecture, is hoping to solve the problem by using drones and tracking devices on dogs to help increasingly frail hunters bag their targets.