少子高齢化 しょうしこうれいか Meanings Noun declining birth rate and aging population Kanji 少 few. Read as ショウ. 子 child 高 high. Read as コウ. 齢 age. Read as レイ. 化 transform. Read as カ. Common phrases 少子高齢化が進む 急速な少子高齢化 Jinuma: Japanese Dictionary · Word lists