This very large skink ran across the road and up the bank just in front of me. I followed it patiently and managed to get a couple of reasonable shots. You can see in the third photo that it has a crooked tail.
Reptilia: Squamata: Scincidae (skinks)
nihontokage = Japanese Five-lined Skink (because the young have this pattern)
Location: In the valley below Mt. Yukawa in Munakata (google map)