Ep.02/12: Emperor Tenmu: The Hidden Birth of Japan

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⏱️ 30-Second Summary ⏱️

The Taika Reforms of 645 catalyzed Japan’s dramatic shift from a loose clan coalition into a highly centralized, Emperor-led state. Subsequently, the triumphant Emperor Tenmu established the nation’s official name, “Nippon,” to show independence, and commissioned monumental historical texts. Ultimately, these strategic political moves, cleverly veiled within enduring mythology and legends, successfully forged a completely unified and proudly independent Japanese national identity.

Forging an Empire: The Taika Reforms
Taika no Kaishin :The 645 political revolution aiming to dismantle clan dominance and establish an Emperor-centric state.
Kochi Komin-sei :The sweeping reform policy transferring all private land and citizens to direct imperial control.
Jinshin no Ran :The brutal 672 succession war resulting in Emperor Tenmu’s ascension to the throne.

The Taika no Kaishin was far more than a simple coup d’état. Nakanooe no Oji (The visionary reformer, later Emperor Tenji) strategically utilized the Kochi Komin-sei to transform Japan from a fragile clan alliance into a singular, powerful nation.

However, this radical restructuring inevitably stripped elite clans of their vested interests, breeding intense resentment.


Consequently, this mounting frustration erupted into the Jinshin no Ran in 672. Prince Oama (The fierce survivor) emerged victorious from this bloody familial conflict, taking the throne as Emperor Tenmu.

Surprisingly, this devastating civil war ruthlessly eliminated remaining political opposition, ultimately granting the new emperor absolute, stabilized power.

🔍 Key Takeaways 🔍

Radical centralization requires dismantling existing power structures. The violent transition from decentralized clan management to top-down imperial control mirrors a hostile corporate takeover, where the surviving CEO finally establishes a rock-solid administration.

Illustration of Emperor Tenmu and ancient texts

── Let’s discover when the nation officially claimed its new name…

スポンサーリンク
Writing Identity: The Birth of Nippon
Kojiki :The domestic mythological chronicle compiled to legitimize the imperial bloodline.
Nihon Shoki :The formal, chronological history book designed for international diplomacy.
Hieda no Are :The exceptional court retainer who memorized vast oral traditions for the Kojiki.

Emperor Tenmu (The absolute monarch) revolutionized the country’s identity by officially adopting the name “Nippon,” replacing externally given titles like “Wa.”

Furthermore, validating this newly independent state required documented historical proof. Therefore, the imperial court systematically commissioned the Kojiki and Nihon Shoki to serve distinctly different political purposes.


However, lacking a comprehensive written archive, the court faced immense logistical challenges. To overcome this, Tenmu commanded Hieda no Are (The living archive) to memorize massive volumes of scattered regional folklore.

Eventually, O no Yasumaro (The royal scribe) transcribed these oral records, successfully codifying the nation’s spiritual and historical foundation.

🔍 Key Takeaways 🔍

A nation’s identity demands a formalized narrative. The strategic dual-publication of a domestic origin story (Kojiki) and an international corporate brochure (Nihon Shoki) exemplifies brilliant geopolitical branding.

Illustration of Susanoo facing the Yamata no Orochi

── Let’s decode the hidden historical truths within these ancient myths…

スポンサーリンク
Decoding Mythology: Monsters and Diplomacy
Sankishin :The three principal deities in Japanese mythology, including Amaterasu and Susanoo.
Tenson Korin :The foundational myth describing the sun goddess’s grandson descending to rule the earth.
Kenzuishi :Official diplomatic envoys dispatched to the Chinese Sui dynasty.

The famous mythological tale of Susanoo (The tempestuous god) slaying the Yamata no Orochi extends far beyond simple fantasy. Modern historians suggest the eight-headed serpent actually symbolizes massive Chinese trade vessels loaded with advanced iron resources.

Thus, the monster’s defeat likely records a factual military operation where the Yamato court forcibly seized foreign technology and wealth.


Similarly, early diplomatic maneuvers clearly demonstrate a drive for sovereign equality. Ono no Imoko (The bold diplomat) delivered a controversial Kenzuishi letter declaring Japan as the land of the “rising sun,” deeply offending the Chinese Emperor.

When Imoko conveniently “lost” the harsh official reply, he likely executed a calculated political cover-up to protect Japan’s nascent independence.

🔍 Key Takeaways 🔍

Ancient myths function as heavily coded political records. These dramatic stories of monster subjugation and divine descent effectively mask the pragmatic, often ruthless power struggles and diplomatic victories of the early Japanese state.

スポンサーリンク
Conclusion: The Architecture of an Empire

The period from the Taika Reforms to the compilation of the national chronicles represents the deliberate architectural design of the Japanese state. By analyzing these events, we witness the strategic transition from tribalism to a unified national identity. The main points of this article are:

‣ The Taika Reforms and Jinshin War ruthlessly centralized political power.
‣ Establishing the name “Nippon” and official histories secured national identity.
‣ Ancient mythology conceals pragmatic diplomatic and military milestones.

We hope these ancient state-building strategies provide valuable perspectives for understanding institutional growth and organizational identity in your own endeavors.

❓FAQ❓

Q1. When did the country officially start using the name “Nippon”?

The government formally adopted it during Emperor Tenmu’s reign in the late 7th century. This strategic rebranding from “Wa” to “Nippon” boldly asserted Japan’s status as an independent, sovereign nation to the international community.

Q2. What is the fundamental difference between the Kojiki and Nihon Shoki?

The Kojiki is a narrative-driven collection of myths designed to legitimize the Emperor’s domestic rule. Conversely, the Nihon Shoki is a formal, chronologically structured document created specifically to demonstrate Japan’s historical prestige to foreign empires.

Q3. How much historical truth exists within Japanese mythology?

Historians believe these myths heavily symbolize actual political and military events. Reading these legendary monster battles and divine conquests as metaphorical accounts of clan subjugation and technological acquisition significantly deepens our understanding of ancient statecraft.

[Main References]
・Edited by Makoto Sato et al., "詳説日本史(日本史探究)", Yamakawa Shuppansha, 2023
・Edited by the National History Textbook Compilation Committee, "市販版 国史教科書", PHP Institute, 2024
・Edited by Haruo Sasayama et al., "詳説 日本史史料集", Yamakawa Shuppansha
Source: Wikimedia Commons
*This article is based on the reliable books and historical materials listed above, but includes original expressions prioritizing clarity.
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