(Martes melampus)
The Japanese marten ( Martes melampus ) is the animal of the genus of the martens most closely related to the sable.It is about half a meter long,not counting the 20 cm long tail,and weighs between 1,000 and 1,500 grams.Males are generally larger than females.The fur varies in color from dark brown to light yellow with a cream-colored throat.Both males and females are territorial and the size of individual territories depends on the availability of food.The Japanese marten is omnivorous and prefers the flesh of fish,frogs,small birds and mammals,but also consumes insects,fruits and seeds when necessary.He sleeps in a den in the hollow of a tree or in a den on the ground.