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Concept
Katsuogi
Summary
Katsuogi or Kasoegi are short, decorative logs found on Japanese and Shinto architecture. They are placed at right angles to the ridgeline of roofs, and are usually featured in religious or imperial architecture. Katsuogi predate Buddhist influence and is an architectural element endemic to Japan. They are often placed on the roof with chigi, a forked ornamentation used on Shinto shrines. Today, katsuogi and chigi are used exclusively on Shinto buildings and can be used to distinguish them from other religious structures, such as Buddhist temples in Japan.
The original purpose of the katsuogi is uncertain. A theory is that the wooden logs were initially used to weigh down the thatch roofing seen in early Japanese structures. As construction techniques improved, the need for weights disappeared, and the logs remained only for ornamental value. Their existence during the Kofun period (250–538) is in any case well documented
by numerous artifacts.
Like the chigi, the katsuogi was initially reserved only for the powerful nobility. It was first described in the Kojiki, a 7th-century Japanese text, where it seemed to be something accessible only to the emperor. In the excerpt, Emperor Yūryaku (418–479) sees an official's house laden with katsuogi on the roof. Angered by this, he pronounces the official a knave and a scoundrel for building a house in imitation of the imperial palace.
Later in history, emperors granted families such as the Nakatomi clan and the Mononobe clan permission to use katsuogi on their houses. As these clans were fervent supporters and administrators of Shinto, the katsuogi would eventually come to decorate Shinto shrines. By the 6th century, katsuogi were beginning to be used on the homes of powerful families, along with chigi. After the Meiji restoration (1868) their use in new shrines was limited to the honden.
The katsuogi is usually a short, rounded log. Most are round, although square or diamond shapes have occasionally been used. Some are carved with tapered ends.
Official source
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