彼は対象をしぼって調査した

N5 彼 kare he N3 対象 taishou target, object, subject N3 調査 chousa survey, investigation, research

N3 彼 hi / kare, kano, ka.no he, that, the N3 対 tai, tsui / aite, kota.eru, soro.i, tsurea.i, nara.bu, muka.u vis-a-vis, opposite, even N2 象 shou, zou / katado.ru elephant, pattern after, imitate N3 調 chou / shira.beru, shira.be, totono.u, totono.eru tune, tone, meter N2 査 sa investigate, investigation, investigar

N4 〜し shi Indicates multiple reasons or qualities, connects clauses or adjectives, means besides that, and also N5 〜を o Marks the direct object of an action, appears before the verb, shows what receives the action N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information