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

polyandry (plurality of husbands at the same time)

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

(grammar) a verbal conjugation class in which the verb stem ends in -i and consists of four alternating bases: -i, -iru, -ire, and -iyo/-iro

the best or top person, such as the best performer in a company, or a leading expert

a journey of a thousand miles begins with a single step

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