Tsutomu Ikeda

Thirteen men and women wake up in a mansion, not knowing who each other is or why they have been abducted. To escape from the mansion, infested by Zombies, they must work together but cannot set aside their suspicions that one or more of their number is involved.

Pilot for a TV series. In the pilot Hiroshi Tachi is a lower ranked samurai investigating the the murder of Tanuma Okitsugu's son Mototomo by Sano Masakoto. Those events are a matter of history but the plot that Hiroshi unveils and is eventually killed for is fictional.