Why dragonflies are called “Katimusi(victory insects)”

勝虫の謂れとオニヤンマ 謂(いわ)れ
トンボが何故「勝虫」と呼ばれるのか!
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As an ancient saying goes…

While there are various theories about the origin of the term “katimushi” (victorious insect), here are some accounts I found through an internet search:
Katimushi… Version 1: According to a legend, when Emperor Yuryaku (reigned 456-479 AD) went hunting in Yoshino, a dragonfly snatched away a horsefly that had bitten his arm. Because of this incident, dragonflies came to be seen as strong and auspicious insects and were used as helmet crests and on other armor.
Katimushi… Version 2: Given that dragonfly larvae resemble armor and that adult dragonflies capture prey while flying, people during the Warring States period considered them to be auspicious. In medieval times, dragonfly motifs were frequently used on armor and samurai clothing.
Katimushi… Version 3: Due to their agile movements and ability to catch prey in mid-air, dragonflies were highly valued by samurai and were called “katimushii” or “katimushi” (victorious army insect). Quivers for arrows were often decorated with dragonfly motifs, and dragonflies were also used on kabuto(helmets). Subsequently, dragonfly motifs became widely used on Noh costumes and summer kimonos.
Katimushi… Version 4: In Japan, dragonflies are believed to bring victory because they always fly forward and never retreat. Considered to be brave and strong insects, dragonflies are seen as auspicious creatures.
While there may be other theories, it seems that the origin of the term “katimushi” can be traced back to the superstitions of warlords during the Warring States period.
The translation for [2024.09.12] was done using our new translation system, “Gemini”.