In many cases, the locals named them inspired by the shape, and that's the case of the small island photographed here, called Niojima, because it is said to look like the statue of a Nio guardian, a type of deity often placed at the entrance of a Japanese Buddhist temple.
EXIF info:
Nikon D700
Lens: VR 80-400mm F/4.5-5.6D
Focal Length: 122mm
Aperture: F/7.1
Shutter Speed: 1/800s
ISO Sensitivity: ISO 250