A big fan of manga since her childhood, she used to frequent book rental shops keeping it secret from her parents. When she was still a elementary student, she even kept a running tab in the book shop!
Her parents where shocked when they saw the bill to pay, and they obliged her not to buy manga any longer. She started drawing manga by herself when she was still a kid (only 10 years old!). She attended the Osaka Seikei Girl's High School. When she was attending the 1st year of high school, she made a deal with her mother: if she wasn't able to make her debut as a comic artist during her 2nd year of high school, she would give it up. In return, her mother would let her draw comics during that year.
As you can see, she succeeded. She made her debut as a mangaka in 1967.
She wrote a lot of manga, the most of which are short horror tales.
Her masterpiece is Garasu no Kamen (aka, the Glass Mask) started in 1976 and not finished yet, but is considered a classic piece.
She won the Kodansha Manga Prize in 1982 with her short horror story 'Youkihiden' and the Excellent Prize of Japan Mangaka Association in 1995 with Garasu no Kamen.
Miuchi's husband was a photographer. It is said that at the beginning she didn't like him and that Ayumi Himekawa and Peter Hammill were modeled on Suzue Miuchi and her husband. He owns a French restaurant in Japan.