その問題について長く議論を重ねた

N5 その sono that, that one near listener N5 問題 mondai problem, question N3 議論 giron discussion, debate, argument

N4 問 mon / to.u, to.i, ton question, ask, problem N4 題 dai topic, subject, sujet N5 長 chou / naga.i, osa long, leader, superior N3 議 gi deliberation, consultation, debate N3 論 ron / agetsura.u argument, discourse, argumentation N4 重 juu, chou / e, omo.i, omo.ri, omo.nau, kasa.neru, kasa.naru, omo heavy, important, esteem

N4 〜について ni tsuite Indicates the topic or subject being discussed, attaches to a noun, means about or regarding 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 N5 〜ね ne Sentence ending particle seeking agreement, softens statement, similar to right or isnt it