How to Read “蛙の面に水”
Kaeru no tsura ni mizu
Meaning of “蛙の面に水”
“Water on frog’s face” is a proverb that describes someone who remains completely calm and unperturbed no matter what is done to them.
Since frogs don’t get startled when water splashes on them but rather accept it as a natural state, this expression refers to the attitude of people who remain completely unfazed when faced with criticism, blame, or harassment, as if nothing had happened. This expression accurately captures situations where someone tries to provoke a reaction from another person but has absolutely no effect.
It is used in situations involving people who show no signs of remorse despite being warned or scolded, people who don’t care about being spoken ill of, or people who remain unshaken despite being pressured. However, this expression often carries a critical nuance, conveying the speaker’s feelings of “I wish they would react a bit more” or “I wish they would take this seriously.” In modern times, it is also used to describe people with thick skin or insensitive people, and sometimes it’s used with a sense of envy.
Origin and Etymology
The origin of “Water on frog’s face” is thought to come from the ecological characteristics of frogs. As amphibians, frogs live both in water and on land, and since they breathe through their skin, they prefer constantly moist environments. Therefore, when water splashes on a frog’s face, they don’t get surprised or flustered like humans would.
This expression based on natural observation can also be found in Edo period literature, where it was already used as a proverb meaning “remaining calm.” The metaphor using frogs, which are familiar creatures, was probably easy for common people to understand and use in daily conversation.
What’s interesting is that this expression accurately captures the physiological characteristics of frogs. Frogs actually absorb moisture through their skin and need water to prevent dehydration. In other words, having water splash on their face is a natural and comfortable state for frogs. This kind of thinking—observing animal behavior and applying it to human behavior—demonstrates the deep insight our ancestors had about nature. The fact that this expression continues to be used today can be attributed to the power of this accurate metaphor.
Interesting Facts
Since frogs actually breathe through their skin, they need to maintain a constantly moist state. Therefore, having water splash on their face is as natural and necessary as humans breathing fresh air.
The frogs mentioned in this proverb probably refer to tree frogs and pond frogs that are widely found in Japan. These frogs are commonly seen near rice paddies and ponds, making them the most familiar amphibians to people in the past.
Usage Examples
- Despite being sternly warned, he showed Water on frog’s face and wasn’t remorseful at all
- Sometimes I envy her Water on frog’s face attitude when facing criticism
Modern Interpretation
In modern society, “Water on frog’s face” has taken on new meanings. With the spread of social media, it’s now often used to describe people who remain unperturbed by online criticism or public backlash. Influencers and celebrities who continue their activities calmly despite receiving critical comments truly embody the modern version of “Water on frog’s face.”
On the other hand, in our information-overloaded era, this characteristic isn’t necessarily a bad thing anymore. To survive in a stressful society, sometimes we need the kind of resilience that “Water on frog’s face” represents. From a mental health perspective, the strength to not be swayed by others’ words is considered one of the skills modern people should develop.
In business settings, this can also be valued as being strong under pressure. In handling complaints or difficult negotiations, the ability to remain unshaken by intimidation is an important skill. However, if one ignores even constructive criticism, there’s a risk of missing growth opportunities, so modern times require a balanced sense of “appropriate insensitivity.”
Thus, this proverb, which was once used mainly in a critical sense, has become a complex expression that can sometimes be viewed as a strength depending on the time and circumstances.
When AI Hears This
For frogs, water isn’t something they can “have splashed on them without concern” – it’s literally their lifeline, absorbed directly into their bodies through their skin. A frog’s skin functions like human lungs, serving as a sophisticated biological system that simultaneously absorbs oxygen and moisture. In fact, skin respiration accounts for about 30-50% of total breathing in many frog species, and they can face life-threatening danger within hours in dry environments.
Knowing this biological fact reveals a fascinating contradiction in the structure of this proverb. What humans interpret as a situation of “unresponsiveness and indifference” is actually the most welcome blessing for a frog. When a frog appears unfazed by being splashed with water, it’s not due to insensitivity – rather, the frog is likely actively absorbing that moisture through its entire skin surface, regulating its internal water balance.
Even more intriguing is the selective permeability of frog skin. It functions as a precision filter system that blocks harmful substances while allowing only necessary water and oxygen to pass through. This means that what appears to be a frog “feeling nothing” on the surface is actually processing incredibly complex biochemical reactions simultaneously, far beyond human imagination.
This proverb inadvertently exposes the limitations of the human observer’s perspective. The biological truth about frogs ironically teaches us about the danger of judging others’ inner states based solely on the presence or absence of surface-level reactions.
Lessons for Today
“Water on frog’s face” teaches modern people the importance of appropriate insensitivity. If we react sensitively to every criticism and opinion, our hearts will become exhausted. Sometimes we need the courage to let things slide.
Especially in today’s information-saturated society, we need the ability to distinguish between voices that are truly important to us and noise that isn’t. We should sincerely accept constructive criticism while responding with “Water on frog’s face” to malicious words or baseless accusations. This sense of balance can be said to be the wisdom for surviving in modern times.
This proverb also contains the message that “it’s okay not to be perfect.” It teaches us the importance of living authentically without being overly concerned about what others think of us. Why don’t you sometimes have the mental space to naturally accept water like a frog? That’s not insensitivity, but rather a gentle strength for living life richly.


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