This next model only fills the Japanese automaker requirement, but it is definitely worth a look: The HW Toyota Tundra.
I don't collect a ton of pickups, but this is a model I really like. My only issue is that they did not mold the Toyota logo into the grill. It seems like that would have been fairly easy. Other than that a pretty mean looking truck.
Which made me think of other Mattel-produced Japanese automaker pickups. I examples of three others, two produced by Matchbox.
Tundra with its competitor, the Titan (and I love the contrast in styles):
HW Nissan Titan:
Matchbox Honda Ridgeline:
Matchbox Mitsubishi Triton:
It was three, the Tundra makes it four in the collection.