Natsuhiko Kyogoku ( 京極 夏彦Kyōgoku Natsuhiko, born March 26, 1963) is a Japanese mystery writer, who is a member of Ōsawa Office. He is a member of the Mystery Writers of Japan and the Honkaku Mystery Writers Club of Japan.
Three of his novels have been turned into feature films; Mōryō no Hako, which won the 1996 Mystery Writers of Japan Award, was also made into an anime TV series, as was Kosetsu Hyaku Monogatari, and his book Loups=Garous was adapted into an anime feature film. Vertical have published his debut novel as The Summer of the Ubume.
Note: The middle part of the story is just getting really terrifyingly long winded (too many needless conversations to get the author's criticism on the post-war Japanese society and woman's right across), plus we never get to meet any of the three victims in the story, we only learn what had happened to them through the description from some third parties, it's disappointing.
I actually like the author taking effort to give voice to his female characters and let them take the main stage, it's a nice gesture but I don't think this good idea is always well excised in the story.
The explanation for the murder mystery is a reasonable one although the murderer's motive is utterly weak and hardly believable.