シャワー効果 シャワーこうか Meanings Noun shower effect (theory that placing high-selling items on the upper floors of a department store will lead to increased sales in the lower floors) See also: 噴水効果 (ふんすいこうか). Kanji 効 effect. Read as コウ. 果 fruit. Read as カ. Jinuma: Japanese Dictionary · Word lists