彼、笛の音を合図に走り出した

N5 彼 kare he N3 笛 fue flute, whistle N4 音 oto sound, noise, note N3 合図 aizu signal, sign, cue N3 出 de outflow, coming (going) out, graduate (of)

N3 彼 hi / kare, kano, ka.no he, that, the N1 笛 teki / fue flute, clarinet, pipe N4 音 on, in, -non / oto, ne sound, noise, son N3 合 gou, gatsu, katsu / a.u, -a.u, a.i, ai-, -a.i, -ai, a.wasu, a.waseru, -a.waseru fit, suit, join N4 図 zu, to / e, haka.ru map, drawing, plan N4 走 sou / hashi.ru run, courir, correr N5 出 shutsu, sui / de.ru, -de, da.su, -da.su, i.deru, i.dasu exit, leave, go out

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 〜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