Overview

Katei (嘉禎), read as Katei in romanization, was a Japanese era name ( nengō ) that spanned from September 1235 through November 1238. Era names are chronological labels used by the imperial court to mark years; Katei succeeded the Bunryaku era and was followed by Ryakunin. The reigning sovereign during Katei was Emperor Shijō (四条天皇).

Characteristics and dating

The Katei era covered a brief interval of slightly over three years. Japanese era names typically change for reasons such as the accession of a new emperor, significant natural events, or in hopes of renewing good fortune; in this period the court continued the practice of selecting auspicious characters to frame time and official documents. Dates within Katei are conventionally cited by year of the era alongside the month and day within the lunar-solar calendar then in use at the Kyoto court.

Political and historical context

Katei falls within the Kamakura period (late 12th to early 14th centuries), when political power in Japan was divided between the imperial court in Kyoto and the military government (the Kamakura shogunate) centered in eastern Japan. Although the emperor remained the symbolic source of legitimacy and the era-name system was an imperial prerogative, real military and administrative authority during this time rested largely with the shogunate and the regent families that guided it.

Notable aspects and significance

There are no widely cited single events uniquely identified with Katei that stand out in general overviews, which is common for many short eras. Its primary significance for historians and chronologists lies in its placement within the sequence of nengō, helping to date documents, religious inscriptions, legal records and court correspondence from the mid-1230s. Works of literature, temple records and governmental orders from surrounding years are often cross-referenced by era name to establish precise chronological order.

How Katei is used by historians

  • As a dating reference for mid-Kamakura-period materials and artifacts.
  • To situate the reign of Emperor Shijō relative to political developments at the shogunate.
  • As part of the broader study of the nengō system, demonstrating how relatively short era names were in regular use.

For readers seeking primary sources or catalog entries, era names such as Katei remain essential indexing terms in museum records, temple archives and classical bibliographies. For introductions to the era-name system and lists of successive eras, see general treatments of Japanese chronological practice and period lists (nengō) or entries for adjacent eras like Bunryaku and Ryakunin.