この調査は全国にわたって行われた

N5 この kono this N3 調査 chousa survey, investigation, research N3 全国 zenkoku whole country, nationwide

N3 調 chou / shira.beru, shira.be, totono.u, totono.eru tune, tone, meter N2 査 sa investigate, investigation, investigar N3 全 zen / matta.ku, sube.te whole, entire, all N5 国 koku / kuni country, pays, país N5 行 kou, gyou, an / i.ku, yu.ku, -yu.ki, -yuki, -i.ki, -iki, okona.u, oko.nau going, journey, carry out

N5 〜に ni Indicates destination, target, arrival point, specific time, or person receiving an action N5 〜の no Indicates possession, relation between nouns, nominal explanation, or turns a verb into a noun phrase N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information