(idiomatic) to be sharp; to be keen; to be on the ball; to have a mind like a steel trap; to be clever

nantaimori

cloth / turban / (abbreviation of 幅): width

rift, gap, break / end, pause, interval

"cut-tailed dragonfly": (idiomatic) cut off and unfinished

astronomy

Kyūjitai form of 天気: weather

Kyūjitai form of 天体 (“celestial body”)

judgement by the emperor

(mythology, Shinto): A heavenly/celestial fox; a nine-tail fox said to be the most powerful form of the kitsune: Once they turn 1,000-years-old, they gain all nine of their tails, turn a golden color, and ascend to the heavens, where they become celestial foxes.