日光性黒子 にっこうせいこくし Meanings Noun solar lentigo; sun spot; liver spot; lentigo solaris See also: 老人性色素斑 (ろうじんせいしきそはん). Kanji 日 day. Read as ニチ. 光 light. Read as コウ. 性 nature. Read as セイ. 黒 black. Read as コク. 子 child. Read as シ. Word lists Medicine Jinuma: Japanese Dictionary · Word lists