Shinmon Aoki (Japanese: ????; born April 11, 1937) is a Japanese writer and poet.
He is best known for his memoirs Coffinman: The Journal of a Buddhist Mortician, published in 1993.
The book was based on his diaries during a period in which he worked as a mortician in the 1970s, a profession which is traditionally regarded as a taboo in Japan due to their perception of death.
In 2008 his memoirs were adapted into a successful Academy Award-winning feature film, Departures, by filmmaker Yojiro Takita.