この問題は難しそうです。

N5 この kono this N5 問題 mondai problem, question N4 そう sou so, like that, really

N4 問 mon / to.u, to.i, ton question, ask, problem N4 題 dai topic, subject, sujet N3 難 nan / kata.i, -gata.i, muzuka.shii, muzuka.shii, mutsuka.shii, -niku.i difficult, impossible, trouble

N4 〜そうだ (ouvi dizer) sou da Indicates information heard from another source, attaches to a full sentence, means I heard that or they say that N4 〜そうだ (aparência) sou da Indicates visual appearance based on observation, attaches to verb or adjective stem, means looks like it will N5 〜です desu Used at the end of a sentence, polite affirmative form, means to be depending on context N4 〜し shi Indicates multiple reasons or qualities, connects clauses or adjectives, means besides that, and also N5 〜で de Indicates where an action happens, means used, tool, cause, or material depending on context N5 〜の no Indicates possession, relation between nouns, nominal explanation, or turns a verb into a noun phrase N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information