to use one's head

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

bright / light / shine

precious articles / valuable item / treasure / ornaments / relic / outstanding individual

device; instrument / container; vessel

device; instrument