Japanese Rat Snake

The Japanese rat snake (Elaphe climacophora) is a colubrid of the genus Elaphe found throughout the Japanese archipelago. It measures 100-200 cm with a girth of about 5 cm, making it the largest snake on mainland Japan outside the Ryukyus. Colour varies widely from dark yellowish brown to a dull green, with notably bluish animals in Hokkaido. Most individuals show four indistinct blackish-brown stripes along the back, though some are unstriped. Juveniles are grey with ladder-like brown blotches, thought to mimic the venomous Japanese pit viper. Strong keels along the edges of the ventral scales let it hook onto trunks and branches and climb vertically, which helps it thrive even in urban settings. It is chiefly diurnal. Non-venomous, it constricts larger prey before swallowing, and it swallows eggs whole, breaking them against projections beneath the vertebrae in its oesophagus. It mates in May and June and lays 4-17 eggs in July and August, which hatch in 47-63 days. An albino population around Iwakuni in Yamaguchi Prefecture has been designated a national monument since 1924.

Source: Wikipedia (CC BY-SA 4.0)

The Japanese Rat Snake lives A captive record of 17 years and 7 months.

The Japanese Rat Snake grows to 100-200cm total length, about 5cm in girth.