Inspector Aizawa Crime Novellas Books in Order

The Inspector Aizawa Crime Novellas are a shorter route into Matthew Legare's 1930s Tokyo setting. They feature Police Inspector Kenji Aizawa and geisha investigator Reiko Watanabe, the central pair from the longer Reiko Watanabe & Inspector Aizawa novels, but focus on a compact case with the same mix of crime, politics, and historical tension.

The series begins with Poison Across Tokyo, set in September 1932. Japan is still dealing with the consequences of the May 15 Incident and the conflict in Manchuria. When a prominent businessman receives a threatening letter, Aizawa quietly asks Reiko to keep watch. The man is soon poisoned, turning a warning into a murder investigation.

More poisonings follow across Tokyo. The victims do not appear to have much in common, and the police are left chasing a killer known as the Poison Woman. Aizawa and Reiko uncover possible links to Korean nationalist groups, political assassinations, and old injuries that powerful people would rather leave buried.

Short does not mean small stakes.

Aizawa approaches the case as a careful investigator. He wants evidence, patterns, and motives, even as the intervention of the Tokko, Japan's Thought Police, threatens to reshape the inquiry. Reiko brings the kind of information that official channels miss, particularly when the case touches the private social spaces and hidden conversations of the city.

The novella format gives the series a brisk, focused feel. The mystery is built around the poisonings and the search for their source, while the larger political atmosphere keeps tightening around the characters. Readers can expect the same period detail found in the full-length novels, including the pressures of a city where businessmen, police, nationalists, and government figures all have reasons to hide the past.

Poison Across Tokyo is the natural starting point. Because it is set after Smoke Over Tokyo and before Treason in Tokyo, readers following the broader Aizawa and Reiko timeline may want to place it there. It can also work as a quick introduction for anyone curious about the pair's world: a tense historical mystery with a clear central crime and enough context to show why 1932 Tokyo is such a dangerous place to investigate.