ちり紙交換 ちりがみこうかん Also written チリ紙交換, 塵紙交換 Meanings Noun collecting waste paper (old newspapers, etc.) and exchanging them for toilet paper Kanji 紙 paper. Read as かみ. 交 exchange. Read as コウ. 換 swap. Read as カン. Jinuma: Japanese Dictionary · Word lists