Nagahama Castle

Overview

Nagahama Castle (長浜城, Nagahama-jō) is a Japanese castle that stood from 1575 to 1615. It was built on the flat ground beside Lake Biwa in what is now Nagahama, Shiga Prefecture, which makes it a hirashiro (平城, hirajiro) — a castle built on a plain rather than on a mountain, a style that became common in the late sixteenth century as castles shifted from defensive mountain strongholds to administrative centres.

The castle belongs to the Azuchi–Momoyama period (1573–1603), the era of unification under Oda Nobunaga and then Toyotomi Hideyoshi. Its construction began in Tenshō 3 (天正三年), the third year of the Tenshō era, corresponding to 1575. It was named after Oda Nobunaga. The site lies at coordinates 35.3775° N, 136.2611° E, in the district of Kōenchō. In the Edo period the castle became the headquarters of Nagahama Domain (長浜藩, Nagahama-han), the feudal territory administered from this location.

History

Nagahama Castle was begun in 1575, in the third year of the Tenshō era. The castle is named after Oda Nobunaga, the warlord who by the 1570s was the dominant military power in central Japan. Nobunaga had destroyed the earlier Asakura and Azai houses in the region around Lake Biwa, and Nagahama was founded as part of the reorganisation of that conquered territory.

The castle's most famous association is with Toyotomi Hideyoshi, who held the area as a fief before his rise to national power. Nagahama served as the base from which he governed the northern shore of Lake Biwa, and the town that grew up around the castle took its name from the castle itself.

The castle's life was short by Japanese standards. It was abandoned in 1615, the year of the Siege of Osaka, when the Tokugawa shogunate moved decisively to limit the number of castles in private hands. The one-castle-per-domain policy of the early Edo period stripped many castles of their function, and Nagahama was among those dismantled. Its buildings and stone were dispersed; some materials are recorded as having been reused at other sites in the region.

After the castle's demolition, the site continued to serve as an administrative centre. Nagahama Domain was established in the Edo period, and the castle location is recorded as the headquarters of that domain, meaning the seat of the daimyō who governed the surrounding territory.

What Stands There Today

Nothing of the original 1575–1615 castle survives above ground. The site is now a public park in central Nagahama, and the principal structure on the location is the Nagahama Castle History Museum (長浜城歴史博物館, Nagahama-jō Rekishi Hakubutsukan), which occupies the castle site and presents the history of the castle and the surrounding area.

The museum building is a modern reconstruction in the style of a Japanese castle keep, a common approach at castle sites across Japan where the original tenshu (天守, tenshu) — the main keep — no longer exists. From the upper levels visitors look out over Lake Biwa, the body of water that gave the castle its strategic and commercial importance.

The site sits within Kōenchō, the district name that preserves the memory of the castle grounds. The area around it retains the layout of the old castle town, with streets that once served the samurai residences and merchants who depended on the castle.

The Name in Japanese

The castle's name in Japanese is 長浜城. It is read ながはまじょう in kana, and written Nagahama-jō in romaji. The final element, 城, is normally read shiro when it stands alone, but becomes jō when attached to a place name — a sound change known as rendaku, or sequential voicing.

Breaking the name down character by character:

長 — read naga in this word. The character means "long." It appears in many Japanese place names and surnames, and here it describes the geography of the shoreline: a long stretch of beach or shore.

浜 — read hama in this word. The character means "beach," "shore," or "seaside." Combined with 長, it gives 長浜 (Nagahama), literally "long beach" — a name that refers to the long shoreline of Lake Biwa on which the settlement sits. The same two characters form a common Japanese surname, Nagahama, and appear in other coastal place names across the country.

城 — read jō in this word. The character means "castle." On its own it is read shiro, and it is the standard element in Japanese castle names: 大阪城 (Ōsaka-jō), 姫路城 (Himeji-jō), 熊本城 (Kumamoto-jō). When it follows a place name, the reading shifts to jō, and the whole name becomes the name of the castle at that place.

So 長浜城 means, transparently, "the castle at Nagahama" — the castle of the long shore. The town took its name from the geography, and the castle took its name from the town.

Visiting and Context

Nagahama is on the northern shore of Lake Biwa in Shiga Prefecture, reachable by train from Kyoto and from the Hokuriku region. The castle site is a short walk from Nagahama Station, in the Kōenchō district.

The Nagahama Castle History Museum occupies the site and is the main reason to visit. The surrounding area preserves several features of the old castle town, and the lakefront setting gives the location the strategic character that made it worth fortifying in 1575.

For readers studying Japanese, Nagahama Castle is a useful case study in castle vocabulary. The word 城 (shiro, jō) appears in the names of hundreds of castles, and the pattern of a place name plus 城 is the standard way Japanese names a castle. The same pattern applies to 長浜城, and recognising it makes the names of other castles immediately readable.