Natsuko Kayama (加山 なつこ, Kayama Natsuko, born January 31, 1971) is a Japanese AV actress from Yokohama City, Kanagawa Prefecture. She is affiliated with Capsule Agency. She was previously affiliated with HY Production. Her body measurements are 98-60-93 cm (39 - 24 - 37 in) (H75 cupsize) and her height is 1.63 m (5′ 5″).

She made her AV debut in 1989 under the stage name Natsuko Kayama (加山 なつ子, Kayama Natsuko). After retiring in 1990, she appeared for a while on television (Gilgamesh Night) and on stage as a stripper. She married at 22 and had a son, but divorced after a year and a half. She made a comeback in 2004 under the stage name Natsuko Kayama (加山 なつこ, Kayama Natsuko) and since then has been active as a mature actress with a voluptuous body.