なぜなら彼は専門家だから

N3 なぜなら nazenara because N5 彼 kare he N4 専門 senmon specialty, major, field N5 家 ie house / home N4 だから dakara therefore, so, that is why

N3 彼 hi / kare, kano, ka.no he, that, the N2 専 sen / moppa.ra specialty, exclusive, mainly N2 門 mon / kado, to gate, counter for cannons, portail N4 家 ka, ke / ie, ya, uchi house, home, family

N5 〜から kara Indicates cause or reason, equivalent to because or since, connects two clauses explaining reason N4 〜なら nara Indicates a condition based on context or already mentioned topic, means if it is the case of N5 〜か ka Marks a question, alternative, or uncertainty, appears at the sentence end or between options N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information