★ The latest novel from Miki Fushio, winner of the Edogawa Rampo Prize! This work swept three of Japan's top literary awards in 2026 — the Ōyabu Haruhiko Prize, the Yoshikawa Eiji Prize for New Writers, and the Mystery Writers of Japan Award — a rare "triple crown" in Japanese mystery fiction.
★ Over 40,000 copies sold and an instant reprint upon release! Ranked No. 1 in Hon no Zasshi's Best of 2025, and No. 4 in the domestic category of Kono Mystery ga Sugoi! 2026 — a phenomenon both critically and commercially.
★ In 1974, an entire family was slaughtered. The case went cold for 50 years — until a body is discovered in an apartment, and the investigation begins to move again. A forensic specialist, a combative organized-crime detective, an investigator sidelined to a desk job, and a rookie female officer — four police officers across the Showa, Heisei, and Reiwa eras take up the pursuit of a single truth.
★ Selection committee member and acclaimed author Arimasa Osawa praised the novel in the Asahi Shimbun as "a police novel that seamlessly blends real events with fictional investigation, one that will be remembered in the history of Japanese mystery fiction."
★ A reader said it left them "feeling completely hollowed out." A heavyweight police suspense epic that simply cannot be put down.

The Showa era is not over for these detectives.
Not until the real killer is found.

In 1974, an entire family was brutally murdered.
The case remained unsolved for fifty years —
until a body is discovered in an apartment, and the hands of the investigation begin to move once more.

On a stormy night, a couple and their daughter were killed. Four perpetrators are believed to have been at the scene, but only one was ever caught. Conspiracy, terrorism, religious entanglements — the police closed in on the group, yet traps and the constraints of the era kept them from ever securing decisive evidence. Fifty years later, one of the suspects is found dead under mysterious circumstances. Natsumi Fujimori, dispatched to the scene, is entrusted with half a century's worth of investigative files. Her superiors grant her just one year. In 2025, exactly a century after the start of the Showa era, can the killer finally be brought to justice? What is the final missing piece needed to uncover the truth? A forensic investigator with a sharp mind, a violent crimes detective who has made too many enemies, an officer pushed to a dead-end post, and a rookie female detective. Showa, Heisei, Reiwa. Four police officers, across three eras, in pursuit of one truth.

Miki Fushio
Born in Sapporo, Hokkaido in 1967, where she still resides. She worked as an office worker before becoming an industrial translator.
In 2021, she debuted as a novelist after winning the 67th Edogawa Rampo Prize for The Cold Case at 43 Degrees North (awarded under the title Semper Fi). Her 2025 novel When the Era Breaks Its Silence became her defining work, earning her three of Japan's most prestigious literary prizes in 2026 — the 28th Ōyabu Haruhiko Prize, the 47th Yoshikawa Eiji Prize for New Writers, and the 79th Mystery Writers of Japan Award (for Best Novel/Serialized Short Story Collection) — achieving a rare "triple crown." Selection committee member Hiroyuki Kurokawa praised her writing, saying she "expertly digests real events and weaves them skillfully into fiction."