The first novel in the RIKO series, featuring the female detective RIKO. It combines hard-boiled police procedural elements with suspense.

RIKO cuts into the darkness beneath the case.

A classic mystery set around a sealed mansion and a reconstructed crime scene, as the cast closes in on an unseen cold-blooded culprit. Motives overlap and the shape of the case keeps changing.

A reconstructed crime scene in the mansion becomes the start of the next tragedy.

This work is recorded as a finalist for the 14th Yokomizo Seishi Award. No standalone book edition has been confirmed.

A finalist piece that traces the shadows of a city.

血雨 is recorded as a prize work, but no standalone book publication could be confirmed.

Details about 血雨 remain in award records.