薬九層倍 くすりくそうばい Meanings Expression there is a huge markup in medicines, making it a profitable field; medicines sell for ten times the cost of their ingredients Kanji 薬 drug. Read as くすり. 九 nine 層 layer. Read as ソウ. 倍 double. Read as バイ. Word lists Yojijukugo (四字熟語) Jinuma: Japanese Dictionary · Word lists