how many times? / numerous times, many times

flashlight, electric torch

Kyūjitai form of 前照灯: headlight

(offensive, Internet slang) Alternative form of 子供部屋おじさん

(offensive, Internet slang) a man whose age is greater than about thirty or forty who lives in one's child room and with one's parent(s).

single room

double room

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"

(mahjong) a 役満 (yakuman, “limit”) hand consisting of four concealed triplets

"the grass is always greener on the other side": The others' circumstances seem more desirable.