Princess Mononoke (1997): The True Meaning of the Forest Spirit and the Trauma of “Deicide”

Princess Mononoke(Studio Ghibli Official) is an animated masterpiece directed by Hayao Miyazaki, released in 1997. In a previous deep dive, I explored the psychological mystery of why the film’s end credits were deliberately left completely, jarringly black.

Read the full analysis: Why Are the End Credits of Princess Mononoke Black?

While that article touched upon the heavy themes of the film, today I want to tackle the ultimate question: “What was Princess Mononoke actually about?” To find the answer, we must examine the narrative through the devastating lens of “deicide” (the killing of a god). And to understand that, we must first look at the bizarre, unforgettable physical design of the Forest Spirit itself.

*This is a translated version. The original (Japanese) is available here.

Princess Mononoke (1997) Analysis: The Unfathomable Design of the Forest Spirit

If someone asked you to “draw a picture of a god,” what would you draw? Because the concept of a “god” is highly abstract, let’s narrow it down to a “mountain god” or a divine ruler of the forest. For the vast majority of us, our minds inevitably default to a humanoid figure, much like the classical depictions below.

Of course, having already seen Princess Mononoke, we might intentionally try to think outside the box, but without that cultural reference point, our human imaginations are inherently limited to human shapes. On the contrary, the Forest Spirit (Shishigami) designed by Director Miyazaki is a creature so utterly alien and unsettling that our standard imagination could never have organically conceived it.

This Forest Spirit is not merely non-humanoid; it is a walking chimera of the ecosystem. In The Ghibli Textbook 10: Princess Mononoke (ジブリの教科書10:もののけ姫, in Japanese), Director Miyazaki states:

“The Forest Spirit, which is the cornerstone of the story, is a completely imaginary animal with a human face, a beast’s body, and tree-like antlers.”

(Original Text in Japanese)
「物語のかなめのとなるシシ神とは、人面と獣の身体、樹木の角をもつまったく空想上の動物である。」

In other words, it is the literal, physical embodiment of “the forest itself.” To truly comprehend the weight of “deicide” in this narrative, we must recognize that this deeply unsettling, unfathomable design—which we mere mortals could never organically dream up— is absolutely critical to the film’s thesis.

The Core Theme of Princess Mononoke: The True Meaning of Deicide

The Form of God Changes

Having established the visual nature of the Forest Spirit, let’s skip straight to the conclusion regarding the main question: “What was Princess Mononoke really about?” Within the context of human psychology and folklore, Princess Mononoke is:

A cinematic documentation of the exact moment in history when the “form of god” fundamentally shifted from an untouchable force of nature into an arrogant, human shape within the minds of the common people.

From a strict historical perspective, the “moment gods became humanoid” in Japan occurred much earlier, around the compilation of the Kojiki and Nihon Shoki mythologies—centuries before the Muromachi period (the 14th-16th centuries) where the film is set.

However, Princess Mononoke is not a rigid historical textbook; it is a folkloric exploration. The Muromachi period is widely recognized as the chaotic, violent incubator where the modern Japanese culture we know today began to truly blossom. In reality, the psychological shift in how commoners viewed the divine was likely a slow, imperceptible fade across generations. But the dramatic, narrative brilliance of this film is that it captures and weaponizes that exact, violent “moment” of transition.

What It Truly Means to “Kill a God”

To fully grasp the tragedy of this shift, we must ask: what does it practically mean for “the form of god to change”? I will quote again from Director Miyazaki’s interview in The Ghibli Textbook:

“There is a feeling that still remains strong as a religious sentiment among many Japanese people. It is the belief that deep within our country, there is a very sacred place where people should not set foot, from which abundant water flows and protects the deep forest. I strongly hold the religious sense that it is most wonderful for humans to return to such a place of sanctity.”

(Original Text, in Japanese)
「今も多くの日本人の中に宗教心として強く残っている感情があります。それは自分たちの国の一番奥に、人が足を踏み入れてはいけない非常に清浄なところがあって、そこには豊かな水が流れ出て、深い森を守っているのだと信じている心です。そういう一種の清浄感があるところに人間は戻っていくのが一番素晴らしいんだという宗教感覚を、僕は激しく持っています。」

If the Forest Spirit is the symbol of “the forest itself,” it must simultaneously serve as the ultimate symbol of that “sacred sanctuary where humans must absolutely not tread.” Furthermore, we cannot ignore the terrifying existence of its nocturnal alter-ego: the Night-Walker (Didarabotchi).

According to the film’s making-of documentary, How Princess Mononoke Was Born (「もののけ姫」はこうして生まれた、in Japanese), the Night-Walker is the physical manifestation of “the darkness of the night itself.” Think back to your childhood—we all possessed an innate, instinctual terror of the dark. The Night-Walker is the towering symbol of our primal “fear” of the unknown.

Now, recall the apocalyptic climax where Lady Eboshi commits deicide. She could not kill the Forest Spirit during the day when it was in its terrestrial “Forest Spirit state.” Likewise, her primitive firearms would be useless against the colossal, intangible “Night-Walker state.” She successfully executes the god at the exact twilight millisecond it is transforming between the two forms. In that singular gunshot, she violently murders both the “sacred sanctuary” and “primal fear” simultaneously.

Thus, to commit “deicide” is to eradicate humanity’s reverence for the sacred and our fear of nature’s wrath. Once those are destroyed, the “form of god” is replaced by humanity itself, meaning all of creation is finally brought under arrogant human control.

So, in this bleak new world where humans have crowned themselves gods, how does Miyazaki expect us to live? I do not believe he made this film simply to preach shallow environmentalism like “Let’s bring back fear!” or “Save the trees!” The philosophical answer is far more agonizing.

The definitive proof of his true message lies in Ashitaka’s pivotal line: “I want to return it with human hands.”

The Significance of “Returning It with Human Hands”

In the bloody climax, Lady Eboshi blows the Forest Spirit’s head off, and the opportunistic mercenary Jigo seals it in a box to present to the Emperor. As the headless, mutating god begins bleeding a suffocating ooze that annihilates the forest, Jigo frantically tries to escape. Ashitaka and San intercept him. When demanding the head back, Ashitaka doesn’t say “Give it to San” or “Give it back to the forest.” He explicitly states: “We must return it with human hands.”

What does this highly specific phrasing mean? It means:

“At the very least, we must never, ever forget that WE are the ones who did this!“

Irontown (Tatara-ba) is the beating, industrialized heart of the film. They clear-cut massive swaths of primeval forest and strip-mine the mountains to fuel their iron forges. But does Miyazaki depict them purely as villains? No. Their industry provides a vital sanctuary for society’s outcasts—women bought from brothels and lepers cast out by their families. The destruction of nature is depicted as an agonizing, entirely “unavoidable” byproduct of human survival.

We live our lives making devastating mistakes, often while genuinely believing we are doing the right thing. We cannot undo the destruction of modernization. But we must never forget the sins we have committed to build our comfort. Perhaps all we can do is “live humbly, at the very least,” carrying the heavy awareness of our actions.

At the end of the story, the Forest Spirit regains its head, but it is too late. The god collapses, and the blast of its death brings a slight, pathetic regeneration to the blasted mountainside. It is not a magical Disney restoration; the primeval forest is gone forever, destined to become a manicured “satoyama” (a human-managed, secondary woodland).

Yet, a tremendous, undeniable miracle occurs in the final moments: the horrific wounds of the lepers wrapped in bandages are completely healed. This is arguably the only purely positive, miraculous scene in the entire film.

Why did this specific miracle happen at the very end? It was the god’s final grace, granted because Ashitaka and San chose to take responsibility and return the head with human hands.

The lepers symbolize those unjustly isolated and stripped of their humanity by society. Their suffering was not a natural disaster; it was entirely “something we did” as a cruel society. By healing them, Miyazaki offers his sole sliver of profound hope: “If we can at least be self-aware of our sins and take responsibility for our actions, a slightly kinder, healed future might be possible.”

Why Ashitaka Must “Ride Yakul to Go”

Finally, let’s examine the heartbreaking final scene between Ashitaka and San. When I first saw Princess Mononoke in the 6th grade, their separation shattered my childish romantic expectations.

Looking back as an adult, I realize that their bittersweet parting represents the exact path that led directly to our modern world. Having committed deicide, humanity crossed the Rubicon. We can no longer live as one with the forest.

We who live in the modern era “ride” bullet trains to look at rivers. We “ride” airplanes to hike in national parks. We “ride” ferries to consume the ancient cedars of Yakushima. The modern era is an age where we “go” to nature simply to consume it as tourists. There is no longer a continuous, terrifying, sacred connection to the wild. Ashitaka has stepped onto that exact, modernized path. That is why he tells San he will live and work in Irontown (human society), but will “ride Yakul to come see you” (visiting nature).

However, Ashitaka refuses to be a blind, apathetic consumer. Because San exists, his heart remains tied to the wild. From now on, Ashitaka will be caught between the industry of Irontown and the sanctity of San’s forest, living out his days in beautiful anguish. Director Miyazaki himself discussed Ashitaka’s difficult future with composer Joe Hisaishi during production, seemingly relishing the character’s agonizing, noble burden.

That final scene is not a tragedy; it is Miyazaki’s ultimate, desperate encouragement to the youth of my generation:

“Children! The world you are inheriting is broken and full of contradictions. It won’t be easy. But just like Ashitaka, you must live with all your might, even while suffering!“

Conclusion: A Burden We Still Carry Today

To summarize this extensive analysis:

I believe this is the raw, beating heart of the film.

Princess Mononoke is a staggering work of art with countless layers, and many will rightfully have opposing views or find my interpretation lacking. But if articulating these thoughts helps even one young viewer grasp the sheer weight of Miyazaki’s masterpiece, then it was worth writing.

Lore Appendix: Why Did the Demon God Nago Flee to the East?

The driving, violent force that kickstarts the entire plot of Princess Mononoke—and the entity that curses Ashitaka—is the boar god Nago. A Tatarigami (curse god) functionally symbolizes an “unavoidable natural disaster,” so over-analyzing the specific logistics of why he attacked Ashitaka’s hidden village is usually a moot point.

However, if we look at the geography, there is a fascinating historical subtext as to why Nago fled specifically to the “East.”

In Japanese history, the concept of “heading east” immediately evokes Emperor Jimmu’s eastern expedition and the bloody subjugation of the indigenous Emishi people. The standard historical narrative taught in schools is the “success story” of the Yamato regime, which began in Kyushu and relentlessly expanded its imperial power eastward. Princess Mononoke brilliantly, and somewhat ironically, frames this “success story” of Yamato expansion as the tragic, violent “process of losing ‘fear’.”

In other words, Nago was poisoned by the iron bullets of westerners (Lady Eboshi’s faction) who had completely lost their fear of the gods. Driven mad by pain and hatred, the god sought a desperate way out, fleeing to the remote “East”—a land that still retained its ancient reverence and fear.

And to the Emishi people—who had not lost their fear of the sacred—Nago “correctly” manifested as a terrifying Tatarigami.

When Ashitaka stands before the maddened beast shouting, “Calm your fury!”, he acts as a true, ancient descendant of the Emishi who respects and understands that sacred fear. But the exact microsecond Ashitaka makes the decision to draw his bow and “fire an arrow in return” to kill the god, he crosses the point of no return. In that moment of violence, Ashitaka dooms himself to walk the exact same cursed, modernized path as the rest of humanity.

Whether you find it sad, poignant, or simply inevitable, Princess Mononoke remains an unfathomably deep cinematic achievement that defies easy understanding.

The images used in this article are from Studio Ghibli Works Still Images.