Hōki

Overview

Hōki (宝亀) was a Japanese era name (年号, nengō; "year name") that followed Jingo-keiun and preceded Ten'ō. The era spanned from October 770 through January 781, placing it within the Nara period (710–794). The reigning emperor during this time was Kōnin-tennō (光仁天皇).

The era began in the tenth month of 770, shortly after the death of Empress Shōtoku, and ended in the first month of 781, when the name was changed to Ten'ō. The Hōki era thus covered roughly a decade of the late Nara period, a time when the imperial court was consolidating power after a series of succession crises.

What Defined the Era

The Hōki era was defined by the accession of Emperor Kōnin and the attempt to stabilise the imperial line. Kōnin was not the first choice for the throne; he was a prince in his late sixties when he became emperor, and his elevation came after the death of Empress Shōtoku, who had reigned twice and had been deeply involved with the Buddhist monk Dōkyō. The court elite, led by figures such as Fujiwara no Momokawa, moved quickly to install Kōnin and to block any lingering influence from Dōkyō's faction.

The era name itself was chosen to mark a fresh start. The name Hōki, meaning "precious tortoise," carried auspicious connotations of longevity and good governance, drawing on Chinese traditions in which the tortoise was a symbol of wisdom and stability. The choice reflected the court's desire to present Kōnin's reign as a return to proper order after the religious and political turbulence of the previous decades.

Another defining feature of the era was the ongoing tension between the imperial court and the powerful Buddhist institutions, particularly the temple Tōdai-ji in Nara. The court took steps to limit the political influence of monks, a reaction to the Dōkyō affair, and sought to reassert secular authority over religious affairs.

Key Events

In 770, the era opened with the death of Empress Shōtoku in the eighth month. The succession was settled quickly, and Prince Shirakabe was enthroned as Emperor Kōnin in the tenth month, the same month the Hōki era began. This was the first imperial accession in which the new emperor was already well into old age, and it set a precedent for later elderly rulers.

In 772, the court formally exiled Dōkyō, the monk who had nearly become emperor during Shōtoku's reign. Dōkyō was sent to Shimotsuke Province, far from the capital, and died there shortly afterward. This act removed the most visible threat to secular rule and confirmed the court's rejection of clerical interference in politics.

In 781, the era came to an end when Emperor Kōnin abdicated in favour of his son, Prince Yamabe, who would become Emperor Kanmu. The abdication took place in the fourth month of 781, and the era name was changed to Ten'ō in the first month of that same year, before the abdication itself. Kanmu's accession marked the beginning of a new phase, as he would later move the capital to Heian-kyō in 794, ending the Nara period.

The Name in Japanese

The Japanese name for this era is 宝亀, read in kana as ほうき, and in romaji as Hōki.

The name consists of two kanji:

• 宝 (ほう, hō): meaning "treasure" or "precious." This character appears in words like 宝物 (ほうもつ, hōmotsu, "treasure") and 宝石 (ほうせき, hōseki, "jewel"). In the context of the era name, it conveys the sense of something valuable and revered.

• 亀 (き, ki): meaning "tortoise" or "turtle." This character is used in 亀 (かめ, kame, "tortoise") and appears in compounds such as 亀裂 (きれつ, kiretsu, "crack," from the pattern of a tortoise shell). The tortoise was a symbol of longevity and wisdom in East Asian tradition, and its shell was used in divination.

Together, 宝亀 can be read as "precious tortoise," an image that evoked the mythical tortoise that was said to carry the world on its back and to live for thousands of years. The name was chosen to signal a prosperous and enduring reign, and it also carried a specific historical reference: the era was named after the Hōki Rebellion, an event in which a tortoise was presented to the court as an auspicious omen, leading to the adoption of the era name.

How the Era Name Works

The Japanese era name system, known as 元号 (げんごう, gengō) or 年号 (ねんごう, nengō), was adopted from China and first used in Japan in 645. An era name is a short phrase, usually two kanji, that designates a period of years under a reigning emperor. The era name is not the same as the emperor's reign; one emperor could have multiple era names, and an era name could change for reasons other than a new emperor, such as natural disasters, auspicious omens, or the beginning of a new zodiac cycle.

When an era name was proclaimed, it took effect on a specific day, and all documents and calendars were dated by the year of that era. For example, the first year of Hōki was 770, and the eleventh year was 781. The era name was changed at the start of 781 to Ten'ō, even though Emperor Kōnin remained on the throne until his abdication later that year.

The selection of an era name was a serious matter. Scholars would propose names drawn from classical Chinese texts, and the court would choose one that carried auspicious meanings. The name had to be new, meaningful, and free of any negative associations. The Hōki name, with its imagery of the tortoise, was chosen in response to a reported omen, reflecting the belief that era names could align the realm with favourable cosmic forces.

The system continued in use until 1868, when the Meiji government adopted a single era name per emperor, a practice that remains in effect today. Under the modern system, the era name is announced upon an emperor's accession and lasts until his death or abdication. The Heisei era (1989–2019) and the Reiwa era (2019–present) are examples of this modern form.