The Tale of the Nihon Shoki’s Compilation

At a Glance

• Central figures: Empress Genshō, ruler of the Yamato court; Prince Toneri, son of Emperor Tenmu and chief compiler of the chronicle; and the team of scholars, scribes, and court officials who assembled the text.
• Setting: The Yamato court of Japan, completed in 720 CE, eight years after the compilation of the Kojiki; the chronicle draws on oral traditions, court records, local chronicles, and archival documents.
• The turn: Empress Genshō commissions Prince Toneri to compile a new official chronicle - one written in Classical Chinese, structured chronologically, and addressed to both domestic audiences and the broader East Asian diplomatic world.
• The outcome: The Nihon Shoki, thirty volumes covering Japan’s history from mythical creation to the reign of Empress Jitō, was completed in 720 CE and presented as a formal record of the imperial line and the Japanese state.
• The legacy: The Nihon Shoki became, alongside the Kojiki, a foundational text for Shinto belief, early Japanese statecraft, and Japan’s diplomatic positioning within the East Asian world order - a status it has held continuously since its completion.

The Kojiki had been finished for eight years when the Yamato court turned to the question of what came next. It was a remarkable document - a record of creation, of the kami, of the long descent from Izanagi and Izanami down to the living imperial family - but it had been composed in a hybrid script, for a domestic audience, in a form that preserved the rhythms and textures of oral tradition. It was not the kind of text you handed to a Chinese diplomat. It was not the kind of text that placed Japan in the same conversation as the great chronicle traditions of the continent. The court understood the difference, and decided something further was needed.

What they built was the Nihon Shoki - the Chronicles of Japan - thirty volumes, completed in 720 CE, written in Classical Chinese, structured as a proper dynastic history. It was history as argument: the argument that the Yamato imperial line was legitimate, ancient, and continuous; that Japan was a civilized nation with roots reaching back to the gods themselves; that its rulers deserved a place alongside the courts of China and Korea as full participants in the political and cultural world of East Asia.

The Court’s Decision and the Gap the Kojiki Left

The Kojiki had done one thing brilliantly. It had set down the mythological substrate of Yamato authority - the creation of the islands, the genealogies of the kami, the divine descent of Emperor Jimmu from Amaterasu’s grandson Ninigi-no-Mikoto, and the unbroken thread of imperial succession that followed. All of that was there, and it mattered enormously for the internal coherence of the court’s claims.

But the Kojiki had not been designed for the outside world. Its structure followed myth and oral tradition more closely than it followed the conventions of Chinese dynastic historiography. It made no particular effort to synchronize Japan’s timeline with Chinese or Korean records, and it was written in a script system that mixed Chinese characters for their sounds with characters for their meanings - a system legible to specialists at the Yamato court, less so to foreign readers trained in pure Classical Chinese prose.

The gap this created was political as much as literary. China had the Shiji, the Han Shu, the long tradition of official histories compiled by the state, organized by reign, treating history as something that could be verified, cross-referenced, and used to demonstrate the legitimacy of a ruling house. To be taken seriously as a state - to negotiate with the Tang dynasty as an equal, to establish a credible position in the network of East Asian courts - Japan needed a document that spoke the same language, literally and formally.

Prince Toneri and the Assembly of Sources

Empress Genshō, who reigned from 715 to 724 CE, gave the commission to Prince Toneri, one of Emperor Tenmu’s sons. Toneri assembled a team - historians, court officials, and scribes - and set them to the work of collecting, comparing, and organizing everything available: the Kojiki itself, local chronicles held by regional clans, court records, and the personal documents of officials stretching back across generations.

The work of compilation was not simply transcription. The compilers had to make choices at every level. Where sources disagreed - and they did disagree, because regional traditions had preserved variant accounts of the same events - the Nihon Shoki often included the variants rather than suppressing them, noting alternative versions in smaller annotations alongside the main text. This approach gave the chronicle an unusual quality: it was simultaneously official and openly plural, acknowledging that history had been told more than one way without abandoning the authoritative main line.

The language throughout is Classical Chinese - the formal literary register that any educated official in Tang China, Silla Korea, or the Yamato court would have recognized immediately. The choice was not incidental. It placed the chronicle in direct conversation with Chinese historiographical tradition, and it signaled that the Yamato court was culturally equipped to participate in that tradition on its own terms.

The Thirty Volumes: Structure and Scope

The finished work moves through three broad regions of time. The first volumes cover mythical origins - the same ground as the Kojiki, beginning with the separation of heaven and earth, the creation of the Japanese islands by Izanagi and Izanami, the birth of Amaterasu and Susanoo and Tsukuyomi, and the eventual descent of Ninigi-no-Mikoto to the earthly realm. The accounts here sometimes differ in detail from the Kojiki’s versions, and the inclusion of variant traditions is particularly visible in these early volumes.

The middle volumes trace the early imperial lineage beginning with Emperor Jimmu, the first emperor, founder of the Yamato dynasty. Here the chronicle builds out the genealogies of successive emperors, their military campaigns, their alliances with and conflicts against regional powers, and the gradual consolidation of central authority across the islands.

The later volumes turn to documented history in a more recognizable sense - political events, court decisions, foreign relations. The chronicle covers Japan’s wars and negotiations with the kingdoms of Korea, diplomatic exchanges with the Chinese court, and the major internal reforms that reshaped the structure of Japanese government. The Taika Reforms of 645 CE receive particular attention: a systematic reorganization of land, taxation, and administration modeled on Tang Chinese governance, one of the clearest examples of the Yamato court deliberately aligning its institutions with continental precedent.

The chronicle ends with the reign of Empress Jitō, who ruled from 686 to 697 CE - close enough to the moment of compilation that the final volumes shade toward living memory.

Japan Positioned in the East Asian World

The deeper argument of the Nihon Shoki becomes visible when you read it against its context. The Tang dynasty at this period was the dominant cultural and political force in East Asia. Korean kingdoms - Silla in particular - had spent generations negotiating their relationships with Tang, adopting Chinese administrative structures, sending students to Chinese academies, and presenting their royal genealogies in terms the Chinese court would recognize. Japan was doing something similar, and the Nihon Shoki was part of that effort.

By presenting the imperial family as descended from the gods and continuous in rule from Jimmu to the present, and by doing so in the literary language of the continent, the chronicle made a claim that was both spiritual and diplomatic. The Yamato emperors were not merely local kings. They were the rightful rulers of a nation with a history as deep and legitimately documented as any in the region. The chronicle’s very existence, in thirty volumes of formal Chinese prose, was evidence for the claim it was making.

The Text That Remained

When the Nihon Shoki was finished, it joined the Kojiki as one of the two pillars of official Japanese historical and religious tradition. Where the Kojiki preserved the texture of myth and oral poetry, the Nihon Shoki provided the structured chronology and the continental framing. Together they gave the Yamato court - and later generations of scholars, priests, and rulers - a layered foundation to draw on.

Shinto practice continued to look to both texts for the names and stories of the kami, for the accounts of ritual origins, for the sacred geography of the islands. The Nihon Shoki became a reference for understanding the early imperial line, the development of court institutions, and the long arc of Japan’s engagement with the rest of East Asia. It has been read continuously since 720 CE - commented on, debated, translated, returned to. The thirty volumes Prince Toneri’s team assembled have not left the conversation.