この薬は、有効成分が薄い

N5 この kono this N5 薬 kusuri medicine, medication N3 有効 yuukou valid, effective N2 成分 seibun ingredient, component, composition N5 薄い usui thin, weak, light-colored

N3 薬 yaku / kusuri medicine, chemical, enamel N4 有 yuu, u / a.ru possess, have, exist N2 効 kou / ki.ku, kikime, nara.u merit, efficacy, efficiency N3 成 sei, jou / na.ru, na.su, -na.su turn into, become, get N3 分 bun, fun, bu / wa.keru, wa.ke, wa.kareru, wa.karu, wa.katsu part, minute of time, segment N2 薄 haku / usu.i, usu-, -usu, usu.meru, usu.maru, usu.ragu, usu.ra-, usu.reru, susuki dilute, thin, weak (tea)

N5 〜が ga Marks the grammatical subject, highlights new information, can also show slight contrast in some sentences 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