一寸法师 / Issun Boshi

一寸法师 is the Japanese folk-tale figure used in 99.很久很久以前，妖怪也推理啊… as the episode’s main example of how [[FolkTaleMysteryRewriting|民间故事推理改写]] works. The traditional story gives him a tiny body, a bowl boat, chopstick oars, a needle sword, an ogre encounter, and a magic mallet that can change size.

In [[MukashiMukashiAruTokoroNiShitaiGaArimashita|《很久很久以前，在某个地方有一具尸体》]], those familiar features become mystery infrastructure. His one-inch size creates a suspicious door gap, his time inside the ogre creates an alibi, and the magic mallet creates both the murder method and the physical clue of an enlarged lizard. The source’s point is that [[SettingBasedMystery|设定系推理]] can be fair when the supernatural rule is stated clearly enough for the reader to reason from it.

Connections

• [[AoyagiAito|青柳碧人]] and [[MukashiMukashiAruTokoroNiShitaiGaArimashita|《很久很久以前，在某个地方有一具尸体》]] - author and book using the folk tale.
• [[SettingBasedMystery|设定系推理]] - genre frame for reasoning inside magical rules.
• [[HonkakuMystery|本格推理]] - puzzle tradition behind the alibi and locked-room handling.
• [[FolkTaleMysteryRewriting|民间故事推理改写]] - adaptation mechanism.
• Observation Before Inference - clue discipline around the lizard, door gap, timing, and mallet rule.