少子化は日本にとって深刻な問題だ

N4 子 ko child, kid N3 日本 nippon Japan N1 とって totte handle, grip, knob N3 深刻 shinkoku serious, grave, severe N5 問題 mondai problem, question

N4 少 shou / suku.nai, suko.shi few, little, un petit peu N5 子 shi, su, tsu / ko, -ko, ne child, sign of the rat, 11PM-1AM N3 化 ka, ke / ba.keru, ba.kasu, fu.keru, ke.suru change, take the form of, influence N5 日 nichi, jitsu / hi, -bi, -ka day, sun, Japan N5 本 hon / moto book, present, main N3 深 shin / fuka.i, -buka.i, fuka.maru, fuka.meru, mi- deep, heighten, intensify N3 刻 koku / kiza.mu, kiza.mi engrave, cut fine, chop N4 問 mon / to.u, to.i, ton question, ask, problem N4 題 dai topic, subject, sujet

N4 〜にとって ni totte Indicates viewpoint, evaluation, or importance for someone, attaches to a noun, means for or from the viewpoint of N5 〜に ni Indicates destination, target, arrival point, specific time, or person receiving an action N5 〜と to Indicates company, quotation, natural condition, complete list, or direct connection between elements N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information