fraternal myotis; long-tailed whiskered bat
A species of bat (Myotis frater) found in East Asia. Scientific/zoological term.
The fraternal myotis is a small bat that can also be found in Japan.
The name likely derives from かぐや (Kaguyahime, the moon princess from The Tale of the Bamboo Cutter) and こうもり (bat), but the exact origin is uncertain.