The largest snake in Japan can be

Ninja Snake is the largest snake in Japan. They are capable of swimming and climbing walls like Ninja warriors.

If you witness the ability to swim or climb on the vertical walls of this snake, you will have to shudder fear that someday will face them right in your own home.

That's what the Japanese mouse snake (Elaphe climacophora) belongs to. They can swim under canals surrounding neighborhoods or climb Japanese tall buildings to find their favorite prey.

Japanese rat snake.(Photo: Tahara).

It is also part of the reason that people call it "Ninja " snake , with the skills to climb on the vertical surface, with little clinging or hiding under the water to ambush the prey.

With a length of 1 to 2m, Snake Ninja is the largest snake in Japan.

Their colors also vary with age , in newborn snakes with green - light yellow to brown stripes in teen snakes and yellow - adult blue, striped patterns help them become same as mamushi poison (Gloydius blomhoffii).

Some of them even have full body white color due to albino (Iwakuni white snakes) and have been protected since 1924 as a National Monument and worshiped and revered by the Japanese, as if messenger of the mountain river god.

It is also for the sake of catching the rat and its spiritual symbol, if one sees this snake climbing the house or swimming in the free water, Japanese people will not catch or harm them but instead feel happy. Because of the appearance of Snake Ninja in his house.

Because they are loved and respected by Japanese people, they are not harmed by humans, their natural enemies are eagles and Badger dogs (raccoon dog has the scientific name Nyctereutes procyonoides).

More importantly, this snake is harmless to humans (without venom) , they only hunt small prey such as rats, frogs, lizards, even climb high trees to catch young birds, snakes of Ninja. There are dormant behaviors from 3 to 4 months and lay 7 to 20 eggs in early summer.