kill two birds with one stone, do one task and finish two or more goals (literally, “one stone, two birds”)

a journey of a thousand miles begins with a single step

first discoverer (used especially in reference to the discovery of a dead body)

the Tokyo metropolitan region; the area surrounding and including the capital of Japan in Eastern Tokyo

(idiomatic) A traditional Japanese meal, consisting of a bowl of soup and three side dishes (rice, pickles, etc.).

(zoology) polyandry

polyandry (plurality of husbands at the same time)

twenty-first day of the month

thirty-first day of the month

Synonym of 亜酸化窒素 (asanka chisso, “nitrous oxide”); dinitrogen monoxide