《很久很久以前，在某个地方有一具尸体》

《很久很久以前，在某个地方有一具尸体》 is the [[AoyagiAito|青柳碧人]] book at the center of 99.很久很久以前，妖怪也推理啊…. The [[MihuanChishu|蜜獾吃书]] episode presents it as a Japanese folk-tale mystery collection: old stories supply the cast, magic, taboos, and impossible premises, while the author uses those premises to build [[HonkakuMystery|本格推理]] mechanisms.

The episode focuses most on two stories. The [[IssunBoshi|一寸法师]] case turns small body size, an ogre’s belly, a festival taboo, and a magic mallet into alibi and semi-locked-room machinery. The [[SaruKaniGassen|猿蟹合战]] case turns a revenge tale into a logic-flow puzzle where role names, shapeshifting, mistaken identity, and exchange murder have to be reconstructed.

The source also briefly maps other stories in the series: 花开爷爷 becomes a death mystery, 鹤的报恩 uses narrative trickery, 浦岛太郎 uses a time-stopping shell for impossible crime, 桃太郎 turns鬼岛 into a closed-circle setup, and饭团咕噜噜 adds repeated-death investigation. Together these examples make the book a compact case of [[FolkTaleMysteryRewriting|民间故事推理改写]].

Connections

• [[AoyagiAito|青柳碧人]] - author discussed through this book.
• [[SettingBasedMystery|设定系推理]] - main genre frame.
• [[HonkakuMystery|本格推理]] - puzzle and clue tradition the episode emphasizes.
• [[FolkTaleMysteryRewriting|民间故事推理改写]] and Story Motif Transmission - adaptation route.
• [[IssunBoshi|一寸法师]] and [[SaruKaniGassen|猿蟹合战]] - primary cases discussed in detail.
• [[PuzzleSnackMystery|推理薯片]] and [[ClosedCircleMystery|暴风雪山庄]] - adjacent mystery pleasures and structures.