なるほどそういう理由だったから遅れたわけだね

N4 なるほど naruhodo I see, indeed, that makes sense N4 そう sou so, like that, really N4 理由 riyuu reason, cause N3 遅れ okure delay, lag

N4 理 ri / kotowari logic, arrangement, reason N3 由 yu, yuu, yui / yoshi, yo.ru wherefore, a reason, c'est pourquoi N3 遅 chi / oku.reru, oku.rasu, oso.i slow, late, back

N3 〜わけだ wake da Indicates logical conclusion or natural explanation, attaches to verb adjective or noun, means no wonder or that explains why N4 〜ほど hodo Indicates degree, extent, comparison, or intensity, attaches to verb, adjective, or noun, means as much as or to the point that N5 〜から kara Indicates cause or reason, equivalent to because or since, connects two clauses explaining reason N5 〜ね ne Sentence ending particle seeking agreement, softens statement, similar to right or isnt it N5 〜か ka Marks a question, alternative, or uncertainty, appears at the sentence end or between options