Tenpyō-kanpō

Tenpyō-kanpō was a Japanese era name used briefly in 749, between Tenpyō and Tenpyō-shōhō, during Emperor Shōmu’s reign.

Japanese era name: A calendar designation marking a period of an emperor’s reign or a chosen auspicious event in Japan. Tenpyō-kanpō was one brief designation in Japan’s system of named eras.
Japanese imperial era: A period in Japanese chronology identified by an era name and numbered years. Tenpyō-kanpō denotes a short interval in this dating system.
Empress Kōken: The Japanese ruler who succeeded Emperor Shōmu in 749 and later reigned as Empress Shōtoku. Her accession followed the brief era during which Shōmu’s reign ended.
Shōmu’s abdication: The transfer of imperial authority from Emperor Shōmu to his daughter Kōken in 749. The transition occurred in the same year as Tenpyō-kanpō.
Tenpyō: A Japanese era name preceding Tenpyō-kanpō, used from 729 to 749. Its final months immediately preceded the adoption of Tenpyō-kanpō.
Japanese era year: A numbered year counted from the beginning of a Japanese era name. Its brief duration meant only part of an era year was designated Tenpyō-kanpō.
Emperor Kōnin: The Japanese emperor whose reign began in 770 after Empress Shōtoku’s death. His later accession belongs to the era sequence that followed the upheavals of the eighth century.
Nara period: A period of Japanese history from 710 to 794, when the capital was based at Heijō-kyō. Tenpyō-kanpō falls within this era of centralized court rule.
Tenpyō-shōhō: A Japanese era name that followed Tenpyō-kanpō, beginning in 749. It replaced Tenpyō-kanpō later in the same year.
Japanese lunisolar calendar: The traditional Japanese calendar, based on lunar months adjusted to the solar year. Its month boundaries help explain why era changes do not align neatly with modern calendar years.

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Jingo-keiunCompared with: Its brief duration contrasts with Jingo-keiun’s four-year span.