- kouseki traces of a moving light, trail (e.g. of a meteor)
Used in poetic or descriptive contexts for the visible trail of moving light, such as meteors or fireworks. Rare in daily conversation; instead, people say 'hikari no ato' or 'nagareboshi' for meteors.
流れ星の光跡が夜空に残った。
Nagareboshi no kouseki ga yozora ni nokotta.
The meteor's light trail remained in the night sky.
花火の光跡が消えるまで見つめていた。
Hanabi no kouseki ga kieru made mitsumete ita.
I stared until the fireworks' light trail disappeared.
⚖️ Commonly confused with 'hikari' (light) itself; 'kouseki' specifically refers to the trace or path left by light, not the light source.
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