Numazu Castle

Overview

Numazu Castle (沼津城, Numazu-jō) stood in the city of Numazu, in what is now Shizuoka Prefecture, on Japan's Pacific coast southwest of Tokyo. It was founded in 1780, the ninth year of the An'ei era (安永, An'ei), and was dismantled in 1872, four years after the Meiji Restoration ended the Tokugawa shogunate's rule. For most of its life it served as the seat of the Mizuno clan (水野氏, Mizuno-shi), the daimyō (大名, lords) of Numazu Domain (沼津藩, Numazu-han).

The castle was a hirayama-jō (平山城, hirayama-jō), a type built on a low rise or plateau within flat country rather than on a mountain peak or on open level ground. This category sits between the mountain-top yamajiro (山城) and the flatland hirajiro (平城), and it allowed a lord to combine the defensive advantages of elevation with easy access to roads, ports and farmland.

History

Numazu occupies a strategic position on the Tōkaidō (東海道, Tōkaidō), the great highway linking Edo (modern Tokyo) with Kyoto, at the point where the road meets the sea near the base of the Izu Peninsula. The Tokugawa shogunate placed trusted lords at such post stations, and Numazu Domain was entrusted to the Mizuno clan, a family with long service to the Tokugawa house.

The castle itself dates from 1780, in the An'ei era. That places its construction late in the Edo period (1603–1868), after more than a century and a half of Tokugawa peace. By that date castles were less fortresses than administrative headquarters, symbols of a lord's authority and centres for tax collection and the running of the domain. Numazu Castle functioned in exactly this way, as the seat of the Mizuno daimyō and the government of Numazu Domain.

The castle's life ended with the fall of the shogunate. The Tokugawa regime collapsed in 1868, and the new Meiji government set about abolishing the domains and dismantling their castles. Numazu Castle was demolished in 1872, the same year the domain system itself was formally replaced by prefectures.

What Stands There Today

Nothing of the Edo-period castle survives as a standing building. The site is now within the built-up centre of Numazu city. The castle's memory is carried by place names and by the city that grew up around it: Numazu is today a substantial city in eastern Shizuoka Prefecture, and the ground once occupied by the castle lies in its central district.

The Name in Japanese

The Japanese name is 沼津城, read ぬまづじょう in kana and written Numazu-jō in romaji. It breaks down into three kanji.

沼 — read ぬま (numa) in this name. It means "marsh", "bog" or "swamp". The character combines the water radical 氵 on the left with a phonetic component on the right, and it appears in many Japanese place names describing wet, low-lying ground.

津 — read づ (zu) in this name. It means "harbour", "port" or "ford", the place where boats land or a river is crossed. Written on its own it is read つ (tsu); in compounds it voices to づ (zu). This is the same 津 found in such port names as Tsu and in the word 港 (minato, harbour).

城 — read じょう (jō) in this name. It means "castle". On its own the character is read しろ (shiro); in compound names of castles it takes the Sino-Japanese reading じょう, which is why nearly every Japanese castle name ends in -jō.

Put together, 沼津 (Numazu) is a place name meaning something like "marsh harbour" — a fitting description of a settlement on low coastal ground with a landing on the sea. Adding 城 (jō) makes "the castle of Numazu". Note the reading shift: the つ of 津 becomes づ when it follows another element in a compound, so 沼津 is Numazu, not Numatsu. Learners will meet the same pattern in names such as 三津 (Mitsu) and 大津 (Ōtsu).

Visiting and Context

Numazu is easily reached on the Tōkaidō Shinkansen and the Tōkaidō Main Line, and it makes a natural stop for anyone tracing the old highway between Tokyo and Kyoto. The castle site lies in the city centre, close to the station area and the waterfront.

Because no original structures remain, Numazu Castle is best understood as part of a wider landscape of Tokugawa-era castle towns along the Tōkaidō. Readers following the history of the period will find the castle's dates a useful marker: built in 1780, at the height of Edo-period peace, and demolished in 1872, in the first years of Meiji, it spans almost exactly the century in which the shogunate rose to its cultural peak and then fell. The name itself, with its marsh, its harbour and its castle, preserves the geography of the place as the Edo period knew it.