Keiko Iwasaka is a Japanese novelist.
Iwasaki was born in Nara or Osaka, Japan on June 17, 1946. She began writing poetry in high school, and began writing novels after graduating from Kwansei Gakuin University. She is married to Takayuki Kiyooka.
She won the Noma Literary Prize in 1986 for her novel . Her won the in 1992. Her 1994 won the Murasaki Shikibu Prize and the . She was awarded the 2000 for her .
She also wrote two nonfiction works about the poets and Mokutarà  Kinoshita. Reviewers wrote positively about both books.