Tsubaki Kato (加藤ツバキ), also billed as Kato, Katoh, Katou Tsubaki and Kaoru Natsuki (夏樹カオル), is a Tokyo-born Japanese AV actress who has worked almost continuously since 2006. She debuted on 7 April 2006 at S1 NO.1 STYLE with 新人×ギリギリモザイク 新人ギリギリモザイク, was quickly typecast in young-wife roles, and later used aliases such as Tsubasa Eto and Mariko Kuroki for uncensored and specialist labels. After years as a planning-single actress for Madonna, Moodyz, Attackers, Nagara STYLE, Bibian, Sky High, Tokyo Hot, SOD and many others, she became a Madonna exclusive in June 2020 with JUL-239 and remains one of the more prolific mature-woman performers of her generation. In 2021 she won supporting-actress honors at the Pink Film Best Ten 2020, and she has also appeared in theatrical pink films, VR, and stage work.