Alternative spelling of 山荒 (“porcupine”)

nocturnality

(zoology) echinoderm

to travel by night

Clipping of 百鬼夜行 (hyakki yagyō).

travelling by night / Clipping of 夜行列車 (yakō ressha).

(Classical Japanese) to be watching continuously, to be on watch repeatedly, to be on look out

(Classical Japanese) to be watching continuously, to be on watch repeatedly, to be on look out / (Classical Japanese) to protect something, to take care of something

(Classical Japanese) to be watching continuously, to be on watch repeatedly, to be on look out / (Classical Japanese) to protect something, to take care of something

(archaic) to stand watch over something, to be on the lookout for something (such as a watchman controlling entry to a place) / (archaic) to protect or defend something, to ensure that something is safe