Eboshigata Castle

Overview

Eboshigata Castle (烏帽子形城, Eboshigata-jō) is a Japanese castle of the late Kamakura period, founded in 1332. It stands in the city of Kawachinagano, in the southern part of Osaka Prefecture, on a hill overlooking the old road routes that linked the Kawachi plain with the mountains of Kii. The castle is counted among the Seven Castles of Kusunoki (楠木七城, Kusunoki shichijō), a group of fortifications associated with the Kusunoki clan, the warrior family that dominated this region in the fourteenth century. Its ruins have been protected as a National Historic Site since 2012, and the site is also registered under Japan Heritage.

History

The castle was founded in 1332, the first year of the Shōkyō era (正慶, Shōkyō), in the closing years of the Kamakura period. The Kamakura shogunate, the military government that had ruled Japan from the eastern city of Kamakura since 1185, was then in its final crisis. In 1333, the year after Eboshigata was built, the shogunate fell. The castle therefore belongs to the last moment of Kamakura-period fortification building, when warriors across Japan were throwing up hilltop strongholds in anticipation of war.

Eboshigata is grouped with the Seven Castles of Kusunoki, the network of forts held by the Kusunoki clan. The Kusunoki were based in this part of Kawachi province, the region that now forms eastern Osaka Prefecture. Their most famous member, Kusunoki Masashige, fought for the Emperor Go-Daigo against the Kamakura shogunate and later against the Ashikaga shogunate that replaced it. The castles of the Kusunoki network were built to control the roads and mountain passes of the region, and Eboshigata's position at Kawachinagano fits that purpose.

The castle's active life belongs to the fourteenth century, the turbulent decades of the Kenmu Restoration and the Northern and Southern Courts period, when Japan was divided between two rival imperial lines. Hilltop castles of this kind were built of earth and timber rather than stone, using ridges, trenches and embankments shaped from the natural terrain.

What Stands There Today

No buildings survive at Eboshigata. What remains is the earthwork: the modified ridge of the hill, with its flattened enclosures, ditches and embankments, preserved as an archaeological site. In 2012 the ruins were designated a National Historic Site, a status that places them under legal protection and recognises their value as evidence of fourteenth-century military engineering. The site is also registered under Japan Heritage, a national programme that promotes regional stories and historic landscapes to visitors.

The Name in Japanese

The castle's name is written 烏帽子形城 and read えぼしがたじょう in kana, or Eboshigata-jō in roman letters.

The word breaks down as follows.

烏 — read e here. The kanji means "crow" or "raven". On its own the character is normally read karasu, but in this compound it takes the reading e, a usage tied to the old word eboshi.

帽 — read boshi here (the h voices to b after the first element). The kanji means "hat" or "cap". Together, 烏帽子 (eboshi) is a single word: a tall, black, lacquered cap worn by courtiers and warriors in premodern Japan. The name of the cap is traditionally explained as "crow's hat", from its black colour and shape.

子 — read ga here. The kanji means "child", but in this name it is not used for its meaning. It supplies the possessive particle ga, the older form of the modern no, linking the cap to the shape that follows.

形 — read ta here. The kanji means "shape" or "form". Combined with the preceding elements, 烏帽子形 (eboshigata) means "eboshi-shaped" — shaped like the tall black cap.

城 — read jō here. The kanji means "castle". It is the standard final element in Japanese castle names, as in Osaka Castle (大坂城, Ōsaka-jō).

So the full name means "the castle of the eboshi shape". The hill on which the castle stands is said to resemble the silhouette of the tall black cap, and the fortification took its name from the landform. The reading Eboshigata-jō follows the usual pattern for castle names: the place name first, then jō.

Visiting and Context

Eboshigata Castle lies within Kawachinagano, a city in southern Osaka Prefecture that grew up along the routes into the Kii mountains. The castle is one of several sites in the area tied to the Kusunoki clan, and visitors interested in the fourteenth century will find it a natural stop alongside the region's other Kusunoki fortifications. The ruins are an earthwork site rather than a reconstructed castle: there is no keep, no gate, no stone wall. What the visitor sees is the shape of the hill itself, cut and levelled by fourteenth-century builders.

For students of Japanese, the name is a useful case study in how kanji work in place names. The characters 烏帽子 carry a meaning — the black cap — but the readings e and boshi are not the readings a learner would guess from a dictionary. The 子 supplies a sound, not a meaning. And 城, the one element that says plainly what the place is, appears in castle names across the country. Reading the name aloud, えぼしがたじょう, is the surest way to hold on to it.