性器 せいき Meanings Noun genitals Kanji 性 nature. Read as セイ. 器 device. Read as キ. Words containing 性器 男性器 (だんせいき) male genitalia 女性器 (じょせいき) female genitalia 女性器切除 (じょせいきせつじょ) female genital cutting And 7 more. Jinuma: Japanese Dictionary · Word lists