the darkest place is under the candlestick; can't see the wood for the trees; people often known little of what happens under their noses; lit. "dark under a candlestick"

tōrō nagashi (the custom of floating paper lanterns down a river especially at the end of the Bon Festival)

headlight, front vehicle light

(anatomy) a palm

mutual, together, each other / used in official or epistolary writings for elegance or politeness

mutual, together, each other, meeting

Short for 合い服 (あいふく, aifuku, “clothing worn in spring or autumn”).

hail (precipitated ice) / ice (frozen water)

one, 1

the fourth of the ten Heavenly Stems