Mineko Iwasaki (?? ??, Iwasaki Mineko) also known as Mineko Iwasaki (?? ??, Iwasaki Mineko), born Masako Tanaka (?? ??, Tanaka Masako, born 2 November 1949), is a Japanese businesswoman, author and former geiko (Kyoto term for geisha).
Iwasaki was the most famous geiko in Japan until her sudden publicized retirement at the age of 29.
Known for her performances for celebrity and royalty during her geisha life, Iwasaki was an established heir or atotori to her geisha house (okiya) while she was just an apprentice.
American author Arthur Golden interviewed her for background information when writing his 1997 book, Memoirs of a Geisha.
Iwasaki later regretted interviewing for Golden, having cited a breach of confidentiality and later sued and settled out of court with Golden for the parallelism between his book and her life.
She later released her own autobiography titled Geisha of Gion (UK) or Geisha: A Life (USA) in 2002.