How to Read “蟷螂の斧”
Tōrō no ono
Meaning of “蟷螂の斧”
The original meaning of “Mantis’s axe” is a proverb that expresses the recklessness of confronting a powerful opponent without understanding one’s own capabilities.
This expression, born from the image of a praying mantis raising its forelegs to confront a carriage much larger than itself, is used to warn against the foolishness of challenging despite an overwhelming difference in power without understanding it. Even today, it is often used for situations where someone challenges a superior opponent without recognizing their lack of ability, or for people who make reckless plans. However, this phrase contains not just simple criticism, but also feelings that acknowledge that courage and spirit. This is because there is a certain aesthetic in the attitude of standing up even when you know you will surely lose. In the business world, it is used to describe situations such as venture companies challenging large corporations without market research, or students taking difficult exams without adequate preparation.
Origin and Etymology
“Mantis’s axe” is a proverb born from a historical tale recorded in the ancient Chinese classic “Han Shi Wai Zhuan.” In this story, when Duke Zhuang of Qi went out hunting, he witnessed a praying mantis standing in the middle of the road with its forelegs raised, confronting the carriage.
When Duke Zhuang saw this scene and asked his charioteer, the charioteer replied, “This is an insect called a praying mantis, which has the habit of confronting enemies without regard for its own strength.” Duke Zhuang was moved by the mantis’s bravery and praised it, saying, “If this were a human, it would have become a brave warrior of the realm.”
This historical tale was transmitted to Japan and became established as the proverb “Mantis’s axe.” This expression came to be used because the mantis’s forelegs look like axes. In ancient China, many moral tales were created to learn about human ways of living from the behavior of such small creatures, and this story has been passed down as one of them. In Japan, it began appearing in literature around the Heian period and was also valued as a word expressing the warrior spirit.
Interesting Facts
The praying mantis’s forelegs actually have the shape of “sickles,” and in English it is called “Praying Mantis.” It was named this because the posture with forelegs together looks like praying, but in reality they are powerful weapons for capturing prey.
In China since ancient times, the praying mantis has been incorporated into martial arts forms as a symbol of “bravery,” and even a martial art called “Mantis Boxing” was born. This applies the swift movements and aggressiveness of the praying mantis to human martial arts.
Usage Examples
- A new employee directly negotiating with the president is truly Mantis’s axe
- A small or medium enterprise challenging a major company in price competition could become Mantis’s axe
Modern Interpretation
In modern society, we can see interesting changes in the interpretation of “Mantis’s axe.” While it traditionally had strong negative connotations warning against recklessness, nowadays there are increasing situations where it is viewed positively as “brave challenge.”
Particularly in the startup world, the attitude of small companies standing up to large corporations is sometimes described as “Mantis’s axe” while being praised in that context. This is probably because the digital revolution has made previously unthinkable comeback stories actually happen. Examples like Google overtaking Yahoo! and Facebook overtaking MySpace have become reality where small defeats large.
With the spread of social media, it has also become commonplace for individuals to voice opinions to large corporations and those in power. These actions are also “Mantis’s axe”-like, but sometimes they become triggers for major social change.
On the other hand, in our modern age of information overload, it has become more difficult to objectively assess one’s own abilities. Since anyone can act like an expert online, the original warning meaning of “not knowing one’s place” may be more important than ever. Modern “Mantis’s axe” can be said to be an expression that symbolizes an era where the boundary line between recklessness and courage has become more ambiguous.
When AI Hears This
“The Mantis’s Axe” contains a remarkable insight that anticipated the Dunning-Kruger effect from modern psychology by over 2,000 years. This cognitive bias describes how people with lower abilities tend to overestimate their own competence while simultaneously underestimating others’ abilities.
The image of a mantis raising its front legs to confront a chariot serves as a perfect metaphor for this effect. The mantis overestimates the power of its “axe” while failing to properly recognize the overwhelming difference in force represented by the chariot. In the study published by Dunning and Kruger in 1999, students who scored in the bottom 25% estimated their performance to be in the top 68%. This state of “ignorance of ignorance” perfectly captures the mantis’s psychology.
What’s fascinating is how this cognitive bias has become even more pronounced in today’s social media society. The phenomenon of criticizing experts with limited knowledge, or proposing simple solutions to complex problems, represents a modern version of “the mantis’s axe.” Ancient Chinese sages accurately captured a fundamental flaw inherent in human cognitive systems through a simple animal metaphor. Perhaps this universality is precisely why proverbs continue to resonate across the ages.
Lessons for Today
What “Mantis’s axe” teaches modern people is the balance between the value of challenging and the importance of self-awareness. Certainly reckless challenges should be avoided, but if everything is divided by calculation, passion and opportunities for growth will be lost from life.
What’s important is clarifying the reason “why challenge.” If it’s action from mere vanity or ignorance, it should be warned against, but if there is clear conviction or eagerness to learn, even if called “Mantis’s axe,” it might be a valuable challenge. In modern society, tolerance for failure has also increased compared to before.
Also, this proverb teaches us how to treat others. When someone is making what seems like a reckless challenge, rather than rejecting them outright, it’s important to have an attitude of trying to understand that person’s feelings and background. Your warm understanding might become the power to transform that person’s “Mantis’s axe” into true courage.


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