Rashomon Gate is the story of Sugawara Akitada, a fictional minor official in the Japanese government during the eleventh century. At this time he is almost thirty years old and, to the regret of his mother, neither married nor successful in his career in the Ministry of Justice. On the other hand, he has a knack and manifest penchant for solving crimes, a trait which has gained him the friendship of men of high and low degree.
While the characters and events are imaginary, certain historical facts about the capital city of Heian Kyo (modern Kyoto), the university system, law enforcement, and the customs and tastes of the eleventh century have been carefully incorporated into this tale, which involves Akitada in the solution of a series of puzzles during the courtship of a reluctant bride.
The story of the disappearing corpse was suggested by two tales (numbers 15/20 and 27/9) in the late-eleventh-century collection Konjaku Monogatari.
The maps of Heian Kyo and of the university are based on historical sources, and the other illustrations are intended to resemble Japanese woodcuts. A historical endnote gives additional information about pertinent aspects of life at the time.