その問題について話しましょう。

N5 その sono that, that one near listener N5 問題 mondai problem, question N5 話 hanashi talk, story, speech

N4 問 mon / to.u, to.i, ton question, ask, problem N4 題 dai topic, subject, sujet N5 話 wa / hana.su, hanashi tale, talk, parler

N4 〜について ni tsuite Indicates the topic or subject being discussed, attaches to a noun, means about or regarding N5 〜ましょう mashou Invitation suggestion or joint proposal form, equivalent to let us do something N4 〜し shi Indicates multiple reasons or qualities, connects clauses or adjectives, means besides that, and also 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