蛍(ほたる)の光(ひかり)窓(まど)の雪(ゆき) (hotaru no hikari mado no yuki, “firefly's dim light, snow reflected on the window → diligent study”)

a placename, such as that of a city in Yamaguchi Prefecture / one of the bullet train services running on the 東海道 (Tōkaido) or 山陽 (San'yō) shinkansen / a surname / a female given name

a male given name / a female given name

gleaming, shining / scenery / enlightening / exhaust, run out / light, gleam, shine / glory, honor/honour, pride

a male or female given name

(Internet slang) dirty room

at-home clothes

an adult son residing with his parents; generally has not yet or can not come into family inheritance / a female servant working in a daimyō, ōoku, or other high-ranking house

room rent

to know only one aspect of a thing