The claim: Dragonflies cannot fly backward, which is why Japanese warriors adopted the insect as a symbol of never retreating.
What the evidence says: Dragonflies can and do fly backward, and they can hover, fly sideways and change direction abruptly — the independent drive of fore- and hindwings is what makes that manoeuvrability possible. The kachimushi tradition is genuine and materially attested on surviving armour, so the symbolism is real; the entomological reasoning offered for it is simply wrong. This is worth stating carefully: the tradition stands, its stated rationale does not.
Why it persists: The claim is repeated because it explains the tradition neatly, and because very few people have watched a dragonfly closely enough to contradict it.
Where you'll meet it: Repetitions of the kachimushi tradition · Popular symbolism guides
Sources (1)
- Peer reviewedWakeling, J. M., Ellington, C. P. (1997)Dragonfly flight: III. Lift and power requirementsJournal of Experimental Biology, vol. 200pp. 583-600Open source