Hagi Castle

Overview

Hagi Castle (萩城, Hagi-jō) is a Japanese castle in the city of Hagi, on the Sea of Japan coast of Yamaguchi Prefecture. Construction began in 1608, in year 13 of the Keichō era (慶長, けいちょう), and the castle stood until 1874. For most of its existence it was the headquarters of the Chōshū Domain (長州藩, Chōshū-han), one of the largest and most politically consequential domains of the Edo period (1603–1868).

The castle is counted among the 100 Fine Castles of Japan, a list maintained by the Japanese Castle Foundation. It also forms part of the Sites of Japan's Meiji Industrial Revolution: Iron and Steel, Shipbuilding and Coal Mining, a serial UNESCO World Heritage property inscribed in 2015.

History

The Mōri clan (毛利氏, Mōri-shi) built Hagi Castle at the opening of the Edo period as the seat of their domain. The castle's active life as a domain headquarters ran for over 250 years, ending in 1863 with the transfer of the domain government to Yamaguchi — an event known in Japanese as 山口移鎮 (Yamaguchi ichin).

Chōshū was one of the two domains, alongside Satsuma, whose samurai drove the overthrow of the Tokugawa shogunate and the Meiji Restoration of 1868. Hagi's role in that story is remembered through the people born there: the castle site is recorded as the birthplace of Kinashi Seiichirō and of Tsunezō Saitō. The castle itself was demolished in 1874, six years after the Restoration, as part of the nationwide dismantling of feudal castles. Its ruins were designated a National Historic Site in 1924.

What Stands There Today

The castle's stone walls, moats and earthen ramparts survive within the ruins, which occupy the foot of Mount Shizuki and the edge of the delta where the Abu River meets the sea. The site is a public park, and the surviving masonry is the main physical record of the original layout. Hagi's old castle town, with its grid of samurai residential streets, remains largely intact around the ruins and is itself a protected historic landscape.

The Name in Japanese

The castle's name is written 萩城. It is read はぎじょう in kana, and Hagi-jō in romaji. The final じょう is the standard Japanese word for "castle," which is why so many Japanese castle names end the same way.

萩 — read hagi here. This kanji means "bush clover," the flowering shrub of the genus Lespedeza that is one of the classic autumn plants of Japanese poetry. It is also the name of the city. The reading hagi is a native Japanese reading, not a Chinese-derived one, so the character is used for its meaning rather than for a borrowed sound.

城 — read jō here. This kanji means "castle" or "fortress." It has two common readings in modern Japanese: the Chinese-derived jō, used in compounds and in castle names, and the native shiro, used when the word stands alone. Hagi Castle is therefore Hagi-jō, never Hagi-shiro, in the same way that English says "Osaka Castle" rather than "the Osaka castle."

A useful pattern for learners: any place name ending in 城 is a castle site, and the character is almost always read jō in that position. The word お城 (おしろ, o-shiro), with the honorific お, is the everyday spoken word for a castle.

Visiting and Context

Hagi sits on the Japan Sea side of western Honshū, in the San'yō region. The castle ruins are within the city, at the base of Mount Shizuki, and the surrounding castle town preserves the street plan and many samurai residences of the Edo period.

Two designations frame a visit. The ruins are a National Historic Site, designated in 1924. Separately, Hagi is one of the components of the Sites of Japan's Meiji Industrial Revolution, the UNESCO World Heritage listing that covers the iron, steel, shipbuilding and coal sites of the nineteenth-century industrialisation drive — a story in which Chōshū domain figures prominently, and which connects the castle town of the Edo period to the industrial nation that followed it.

For readers studying Japanese, Hagi is a useful word to know beyond the castle: 萩 appears in place names, in the names of traditional sweets, and in classical poetry as one of the seven autumn grasses. The castle name ties the plant, the city and the fortification into a single three-character phrase.