The Man Who Died by Yasuhiko Nishizawa

Hisataro, a young member of the wealthy Fuchigami family, has a mysterious ability. Every now and then, against his will, he falls into a time-loop in which he is obliged to re-live the same day a total of 9 times. Little does he know how useful this ability will be, until one day, his grandfather mysteriously dies. As he returns to the day of the murder time and again, Hisataro begins to unravel its secrets. With a sizeable inheritance up for grabs, motives abound, and everyone is a suspect. Can Hisataro solve the mystery of his grandfather's death before his powers run out?