Kozosu (birth date unknown – April 1626) was born into a samurai family and lived from the Azuchi Momoyama period to the early Edo period, becoming the top joro (high ranking female servant) to Kodaiin and later to Hidetada TOKUGAWA.
孝蔵主（こうぞうす、?-寛永3年（1626年4月）は、高台院付きの筆頭上臈（高級女中）で後に徳川秀忠付き上臈となった安土桃山時代～江戸時代初期の武家女性。