本格推理 / Honkaku Mystery

本格推理 is the mystery mode used in 99.很久很久以前，妖怪也推理啊… to orient listeners before the episode turns to folk-tale puzzles. The hosts summarize it as a mode centered on who committed the crime and how the crime was possible, with special attention to clues, alibis, locked rooms, and the intellectual game between author and reader.

The episode contrasts this with social-school mystery, where the “why” of crime and its social or psychological background often matters more. That distinction matters because 《很久很久以前，在某个地方有一具尸体》 is not trying to be a realist social novel. It is using 设定系推理 to extend the本格 pleasure into a world where monsters, magic props, and animal transformation are real.

In the source’s frame, new本格 and setting-based mystery are ways to renew artificial puzzle pleasure without apologizing for artificiality. The point is not that every premise resembles real policing; the point is that the clues and rules let the answer snap into place.

115.京极夏彦今昔续百鬼：不研究妖怪，怎么好好做人？ adds a heavier folklore-and-aftercare contrast through 京极夏彦. In 《暗眼小僧》, clue work still matters, but the source emphasizes layers of wrong explanation, 妖怪图像阐释, postwar memory, and the question of what the living should do after the truth is known.

144. 被诅咒的木乃伊：福尔摩斯会和老舍联手探案吗？ adds a qualifying case through 岛田庄司’s 《被诅咒的木乃伊》. The episode recognizes the locked-room, mummy-body, impostor, and clue-reversal machinery as本格 material, but it says the book’s stronger appeal lies in Holmes pastiche, 双手稿叙事, and 东方主义谜题误导. This makes本格 one component of the reading pleasure rather than the sole standard of value.

Key Claims

• 本格推理 prioritizes solvable mechanism: who, how, alibi, clue, false theory, and final reconstruction.
• Social explanation can exist, but it is not the main evaluative standard for this source’s folk-tale mysteries.
• Highly artificial settings can still be fair if their rules are introduced before the solution depends on them.
• The pleasure overlaps with 推理薯片, but can involve more elaborate rule-world construction.
• Setting-based mystery shows that fair-play deduction does not require ordinary realism; it requires rule consistency.
• Yokai mystery can borrow本格’s clue discipline while shifting the payoff from culprit mechanics toward human consequence and interpretive repair.
• A mystery can use本格 machinery while being evaluated mainly for pastiche voice, narrative framing, and cultural comedy.

Connections

• 设定系推理 - source’s specific extension of本格 into invented rule-worlds.
• 青柳碧人 and 《很久很久以前，在某个地方有一具尸体》 - source example.
• 一寸法师 and 猿蟹合战 - folk-tale cases.
• 推理薯片, 暴风雪山庄, and Observation Before Inference - adjacent mystery concepts.
• Historical Detective Reasoning and 日常推理 - neighboring modes that use inference for different payoffs.
• 妖怪推理, 《今昔续百鬼·云》, and 《暗眼小僧》 - episode 115’s folklore-heavy contrast.
• 《被诅咒的木乃伊》, 福尔摩斯同人传统, and 双手稿叙事 - episode 144’s pastiche-heavy qualifying case.