Keiun followed the Taihō Period (701–704), when the Taihō Code helped establish a more organized legal and administrative system based on the ritsuryō system. During Keiun, the imperial government continued putting these reforms into practice. Officials worked to improve taxation, provincial administration, population records, law, and the management of state resources.
The period was also part of a wider transformation in Japanese culture and politics. Buddhism continued to grow in importance, while Japan adopted and adapted political, legal, cultural, and economic ideas from Tang China and the Korean Peninsula. The government also continued developing Japan's early monetary system.
The end of the Keiun era in 708 CE was followed by the Wadō Period, during which the famous Wadō Kaichin copper coin was issued. Only two years later, in 710 CE, the capital was moved from Fujiwara-kyō to Heijō-kyō, marking the beginning of the Nara Period.
For this reason, the Keiun Period in Japanese history can be understood as an important bridge between the political reforms of the Asuka era and the more developed centralized state of the Nara period.
What Was the Keiun Period?
The Keiun Period (慶雲, Keiun) was a Japanese nengō, or era name, used by the imperial court.
A nengō was used to identify a period associated with an emperor's reign or a significant event. Japan has used era names for centuries, and they remain an important part of Japanese historical dating.
The Keiun era began in 704 CE and ended in 708 CE.
Keiun Period at a Glance
| Feature | Details |
|---|---|
| Japanese name | 慶雲 (Keiun) |
| Meaning | Often translated as "Auspicious Cloud" |
| Start | 704 CE |
| End | 708 CE |
| Emperor at the beginning | Emperor Monmu |
| Emperor at the end | Empress Genmei |
| Previous era | Taihō |
| Following era | Wadō |
| Historical setting | Late Asuka period and transition toward the Nara period |
| Capital | Fujiwara-kyō |
| Major development | Continued development of the ritsuryō state |
| Important monetary development | Development of early Japanese coinage, followed by Wadō Kaichin in 708 |
The name Keiun is generally understood as referring to an auspicious or favorable cloud, which was viewed in traditional East Asian culture as a positive sign.
Historical Background of the Keiun Period
The Keiun Period cannot be fully understood without looking at the major political changes that took place in Japan during the seventh century.
During this period, the Japanese imperial court was gradually moving away from a political system dominated by powerful clans and toward a more centralized government.
One major turning point was the Taika Reform of 645. The reforms associated with this movement aimed to increase imperial authority and reorganize the administration of the country.
The transformation continued under later rulers, particularly Emperor Tenmu and Empress Jitō. Government institutions became more organized, while the court developed new systems for managing land, taxation, officials, and the population.
Another important development was the establishment of Fujiwara-kyō in 694 CE. The planned capital reflected the growing influence of Chinese-style urban planning and the increasing power of the central government.
The next major step came with the Taihō Code of 701.
When the Keiun Period began in 704, Japan was therefore already in the middle of a major process of state building.
Emperor Monmu and the Keiun Period
The Keiun era began during the reign of Emperor Monmu, who ruled from 697 to 707 CE.
Emperor Monmu's reign was important because it continued the reforms that had been developed during the reigns of earlier rulers.
The government sought to:
strengthen imperial authority
organize government offices
improve provincial administration
collect taxes more effectively
maintain population records
enforce laws
manage state lands and resources
organize labor obligations
support religious institutions
However, it is important to note that Keiun did not take place entirely under Emperor Monmu.
Emperor Monmu died in 707 CE. His mother, Empress Genmei, succeeded him, and the Keiun era continued until 708 CE. The next era, Wadō, began in 708.
This transition shows that Japanese era names did not always correspond exactly to the reign of a single emperor.
The Taihō Code and the Ritsuryō Government
One of the most important foundations of the Keiun Period was the Taihō Code, introduced in 701.
The Taihō Code was part of the ritsuryō system, a structured system of laws and government administration.
The word ritsuryō is traditionally explained through two parts:
Ritsu – criminal laws
Ryō – administrative and civil regulations
The system was influenced by political and legal institutions in East Asia, particularly those of China.
The Japanese government adapted these ideas to its own political and social conditions.
During the Keiun Period, the government continued developing this system rather than creating an entirely new one.
Areas Covered by the Ritsuryō System
The government increasingly organized:
taxation
population registration
land administration
criminal law
government ranks
official appointments
military obligations
provincial administration
labor duties
state ceremonies
religious institutions
The system helped create a clearer structure connecting the imperial court with officials throughout the country.
However, it is important not to imagine the Keiun government as a modern centralized government. Its actual control varied greatly by region, and powerful local families continued to play an important role.
Centralization of the Japanese State
The Keiun Period formed part of a much larger process of centralization in early Japan.
The imperial court was attempting to establish a hierarchy of government offices that extended from the capital into the provinces.
Under the developing ritsuryō system, the state sought greater control over:
land
agricultural production
taxation
population records
labor
legal administration
military obligations
government resources
This helped the imperial court become more powerful than it had been under the earlier clan-based political system.
The process was gradual, however. The government still depended on aristocratic families and local elites to operate many parts of the system.
Provincial Administration During the Keiun Period
Provincial government became increasingly important during this period.
Japan was divided into provinces known as kuni. The central government appointed officials known as kokushi to administer these provinces.
Their duties included:
collecting taxes
managing government resources
maintaining records
supervising agricultural production
administering justice
organizing labor
reporting provincial conditions to the central government
This system helped the imperial court extend its authority beyond the capital.
Nevertheless, government control was not equally strong everywhere. Remote areas remained difficult to administer, and local leaders continued to have considerable influence.
Therefore, the Keiun Period should be seen as a stage in the gradual formation of a centralized Japanese state, rather than the completion of that process.
Land, Agriculture, and Taxation
Agriculture was the foundation of the Japanese economy during the Keiun Period.
Most people lived in rural communities and depended on farming, particularly rice cultivation.
Agricultural production supported:
the imperial court
government officials
religious institutions
public works
military activities
local administration
The ritsuryō system attempted to organize the relationship between the state, land, and population.
Population registers were important because the government used information about households to determine taxation and other obligations.
Taxes in Early Japan
The economy was still largely based on agricultural products, textiles, and labor services rather than money.
Rice, cloth, silk, and other goods could be used to meet obligations to the government.
This is important when discussing early Japanese coinage because the introduction of coins did not immediately replace the older system of payment in goods and labor.
Early Japanese Coinage and the Keiun Period
The development of coinage is one of the most interesting aspects of the history surrounding the Keiun Period.
Japan had begun experimenting with coins before Keiun. One important example is the Fuhonsen, a group of early Japanese copper-alloy coins associated with the seventh century. Their exact date, purpose, and status have been debated by historians.
Therefore, it is not accurate to describe the Keiun Period as the moment when Japan suddenly created its first coin.
Instead, Keiun belongs to a broader period during which the Japanese government was experimenting with and developing a more organized monetary system.
At the time, most economic activity still depended heavily on:
rice
cloth
silk
agricultural goods
labor services
local exchange
The use of coins was still limited.
The Wadō Kaichin and the End of the Keiun Era
The most famous monetary development associated with the end of this period was the introduction of the Wadō Kaichin in 708 CE.
The coin was issued during the Wadō Period, which began after Keiun ended.
Wadō Kaichin was a round copper coin with a square hole in the center, following a design common in East Asian coinage.
Wadō Kaichin
The coin is one of the best-known examples of early Japanese official coinage.
Its production was connected with the development of the Japanese state and its efforts to establish a more organized monetary economy.
Why Was Wadō Kaichin Important?
A government-issued currency could help facilitate:
trade
government payments
market activity
economic administration
payments for goods and services
the wider use of money
However, Wadō Kaichin did not immediately turn Japan into a fully monetary economy.
Coins circulated unevenly, and many people continued to rely on goods and agricultural products for economic exchange.
The introduction of Wadō Kaichin is therefore best understood as an important step in the long-term development of Japan's monetary system.
Buddhism During the Keiun Period
Buddhism continued to expand in political, cultural, and religious importance during the Keiun Period.
Buddhism had reached Japan centuries earlier, but by the seventh and early eighth centuries it had become closely connected with the imperial court and aristocracy.
The ruling elite supported Buddhist temples and monks, while Buddhist ideas influenced art, architecture, education, politics, and religious practices.
Buddhist institutions also served as important centers for:
learning
writing
artistic production
religious ceremonies
cultural exchange
The government increasingly recognized religion as an important part of public and political life.
This close relationship between the state and Buddhism became even more significant during the Nara period.
Chinese and Korean Influence on Japan
The Keiun Period was strongly influenced by developments in East Asia.
Japan maintained diplomatic and cultural contacts with the Korean Peninsula and China. These connections helped Japanese rulers gain access to new ideas and technologies.
The Tang dynasty of China was especially influential.
Japanese leaders studied and adapted continental models in areas such as:
government administration
law
writing
Buddhism
architecture
calendar systems
political thought
city planning
monetary systems
The influence was particularly visible in the organization of government and the design of the capital.
However, Japan did not simply copy China.
Japanese rulers adapted foreign ideas to local conditions and combined them with existing Japanese traditions.
This process played a major role in the formation of early Japanese civilization.
Writing, Education, and Intellectual Culture
Chinese characters, known in Japanese as kanji, remained the main writing system used by the government and educated elite.
Official documents, laws, religious texts, administrative records, and diplomatic communications were written using forms of Classical Chinese.
The growing use of writing was essential to the development of a centralized government because officials needed written records to manage:
population registers
taxation
laws
government orders
land
official appointments
religious activities
The Keiun Period also belongs to the wider intellectual environment that produced some of Japan's earliest major historical texts.
The Kojiki was completed in 712 CE, only a few years after Keiun ended, while the Nihon Shoki was completed in 720 CE.
These works preserved myths, legends, genealogies, traditions, and accounts of Japan's early rulers.
They provide important evidence for understanding how the early Japanese court viewed its own history and political authority.
Fujiwara no Fuhito and the Rise of Court Aristocracy
The development of a centralized government required an expanding group of officials and administrators.
Aristocratic families became increasingly important in operating the new political system.
One of the most important figures of this period was Fujiwara no Fuhito, a leading court official and member of the powerful Fujiwara family.
Fuhito played an important role in the development of the early ritsuryō state and was closely connected with the political reforms of the early eighth century.
The Fujiwara family would become one of the most powerful aristocratic families in Japanese history.
Its political influence grew considerably during later periods, particularly during the Heian period.
The Capital During the Keiun Period
During the Keiun Period, the imperial court was based at Fujiwara-kyō, which had served as the capital since 694 CE.
Fujiwara-kyō was located in the Yamato region of what is now Nara Prefecture.
The city represented a major change in Japanese urban planning.
Its layout was influenced by Chinese capital-city designs and included:
the imperial palace
government offices
roads
aristocratic residences
religious institutions
planned urban areas
The construction of Fujiwara-kyō demonstrated the growing ability of the imperial government to organize large public projects.
However, the capital did not remain in use for long.
In 710 CE, during the Wadō era, the court moved to Heijō-kyō, better known as Nara.
This relocation is traditionally regarded as the beginning of the Nara Period.
Important Events Around the Keiun Period
The following timeline places Keiun within the broader history of early Japan:
Year | Event |
|---|---|
645 | Taika Reform begins |
672 | Jinshin War |
673 | Emperor Tenmu begins his reign |
694 | Capital moves to Fujiwara-kyō |
701 | Taihō Code is established |
704 | Keiun era begins |
704–708 | Ritsuryō institutions continue to develop |
707 | Emperor Monmu dies |
707 | Empress Genmei succeeds to the throne |
708 | Keiun era ends |
708 | Wadō era begins |
708 | Wadō Kaichin is issued |
710 | Capital moves to Heijō-kyō |
710 | Nara Period begins |
The End of the Keiun Period
The Keiun Period ended in 708 CE.
The change came after the death of Emperor Monmu in 707. His mother, Empress Genmei, became the new sovereign.
In 708, the court adopted the new era name Wadō, ending the Keiun era.
The change from Keiun to Wadō was part of the continuing tradition of changing era names when a new reign or significant event occurred.
The early Wadō era quickly became associated with important developments, including the issuing of Wadō Kaichin and the continued development of Japan's centralized state.
Only two years later, in 710, the capital was moved to Heijō-kyō, beginning the Nara Period.
Historical Importance of the Keiun Period
The Keiun Period was short, but its historical importance comes from its position at a major turning point.
It stood between the political reforms of the seventh century and the more established Nara-period state.
During this period, Japan continued developing:
Centralized imperial government
The ritsuryō legal and administrative system
Provincial government
Taxation and population registration
A more organized social hierarchy
Buddhist institutions
Chinese-influenced government practices
Early monetary systems
Planned capital cities
A stronger written administrative culture
These developments did not appear suddenly during Keiun. Rather, the period helped continue and consolidate changes that had begun decades earlier.
Keiun Period vs. Taihō Period
The Keiun Period directly followed the Taihō Period, making the two eras closely connected.
| Feature | Taihō Period | Keiun Period |
|---|---|---|
| Dates | 701–704 CE | 704–708 CE |
| Main emperor | Emperor Monmu | Emperor Monmu, then Empress Genmei |
| Main development | Taihō Code | Continued implementation of ritsuryō institutions |
| Government | Legal framework strengthened | Administrative system further developed |
| Economy | Agricultural taxation | Continued organization of taxation and resources |
| Coinage | Early monetary development | Continued development before Wadō Kaichin |
| Capital | Fujiwara-kyō | Fujiwara-kyō |
| Historical role | Strengthened the legal foundation of the state | Helped consolidate the emerging centralized state |
In simple terms, the Taihō era provided an important legal foundation, while the Keiun era continued the process of putting those reforms into practice.
Why Is the Keiun Period Important in Japanese History?
The Keiun Period is important because it represents a transition from earlier political reforms toward the more organized state of the Nara period.
1. Strengthening of Imperial Government
The imperial court continued expanding its administrative authority and its ability to manage resources throughout the country.
2. Development of the Ritsuryō State
The Taihō Code provided an important legal framework for government, while Keiun saw the continued development of the institutions based on that framework.
3. Provincial Administration
The central government continued organizing provinces and appointing officials to represent imperial authority outside the capital.
4. Growth of Buddhism
Buddhist institutions became increasingly connected with the court, aristocracy, education, and culture.
5. Development of Early Coinage
The era came immediately before the introduction of Wadō Kaichin in 708, an important milestone in the history of Japanese official coinage.
6. Cultural Exchange With East Asia
Chinese and Korean influence continued shaping Japanese government, religion, writing, architecture, and political thought.
7. Preparation for the Nara Period
The political and administrative changes of the Keiun era helped prepare Japan for the move to Heijō-kyō in 710 and the beginning of the Nara Period.
Legacy of the Keiun Period
The legacy of Keiun can be understood as part of the larger formation of Japan's early centralized state.
The period itself was brief, but it came during an era of rapid change. The imperial court was expanding its administrative system, provincial government was becoming more organized, Buddhist institutions were gaining influence, and continental ideas were being adapted to Japanese conditions.
The development of official coinage also reflected the government's growing interest in managing the economy through state institutions.
These changes became more visible during the Nara Period, when the Japanese government operated from Heijō-kyō and the ritsuryō state reached a more developed stage.
The Keiun Period therefore holds an important place in Japanese history because it helped connect the reforms of the seventh century with the political and cultural achievements of the eighth century.
Conclusion
The Keiun Period in Japan (704–708 CE) was a brief but important stage in the formation of Japan's early centralized state. Beginning during the reign of Emperor Monmu and continuing under Empress Genmei, the era followed the Taihō Period and continued the political and administrative changes associated with the ritsuryō system.
During Keiun, the imperial government continued strengthening provincial administration, taxation, population registration, law, and government institutions. At the same time, Buddhism became increasingly important to the court and aristocracy, while cultural connections with Tang China and the Korean Peninsula influenced Japanese government, writing, architecture, religion, and political thought.
The period also stands near an important moment in the history of Japanese money. Although coinage existed before Keiun, the era immediately preceded the introduction of the Wadō Kaichin in 708, one of the most famous examples of early official Japanese coinage. The development of currency reflected the broader efforts of the Japanese government to create more organized economic and administrative institutions.
The importance of Keiun becomes even clearer when viewed in the context of what followed. The Wadō era began in 708, and in 710 CE the capital was moved to Heijō-kyō, marking the beginning of the Nara Period.
Ultimately, the Keiun Period in Japanese history should be understood not as an isolated four-year era, but as part of a much larger transformation. It helped connect the political reforms of the Asuka era with the more developed Nara-period state. Its contributions to government administration, law, taxation, provincial organization, Buddhism, cultural exchange, and early coinage make it an important period for understanding the formation of early imperial Japan.
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