fallen ear of grain

Short for 落ち物パズルゲーム (ochimono pazuru gēmu).

downward trend

(fiction) becoming part of the dark side

落ちる: to fall

(historical) a kind of hairstyle worn by women of the nobility in the late Edo period as a simplification of the 大垂髪 (ōsuberakashi) style, with no 簪 (kanzashi, “ornamental hairpin”) or other adornment, and with the long hair of an additional hairpiece allowed to hang loose in back

fallen leaves

the pit of the stomach, solar plexus

(idiomatic) unconvincing; incomprehensible; not making sense

imbalance, prejudiced.