During the day, this squirrel hides in a hole, usually in a coniferous tree, emerging at night to feed.

The differences between Japanese dwarf flying squirrels and other Sciuridae is evident when comparing morphology of the mandible and genetic code.

The marmots (Marmota) also have a more elongated mandible than the Japanese dwarf flying squirrel.

In this particular species of flying squirrel, their patagium spans between their wrists and ankles, but not between their legs and tail.

[7] The Japanese dwarf flying squirrel is nocturnal, and during the day it rests in holes in trees.

[8] When it feeds, the Japanese dwarf flying squirrel assumes a hanging posture.

The squirrels tend to mate twice a year between the months of May and July, with a gestation period of around four weeks.

The Japanese dwarf flying squirrel is found in some protected areas, has a wide range, and is relatively common.