Nagoya Castle

Overview

Nagoya Castle (名護屋城, Nagoya-jō) was a Japanese castle in the Chinzei neighborhood of Karatsu, Saga Prefecture, in the historical province of Hizen. To distinguish it from the more famous Nagoya Castle in Aichi Prefecture, it is sometimes called Hizen-Nagoya Castle. The castle stood on a hill at the center of the Higashi Matsuura peninsula, roughly 10 kilometers north of Karatsu city.

The castle dates to 1592, the first year of the Bunroku era (文禄), during the Azuchi–Momoyama period (1573–1603). It served as the staging ground for Toyotomi Hideyoshi’s invasions of Korea, which ran from 1592 to 1598. None of the original structures survive, but the ruined foundations remain and are protected as a Special Historic Site.

History

Toyotomi Hideyoshi ordered the construction of Nagoya Castle in 1592 as the forward base for his campaigns against Korea. The location was chosen for its position on the Higashi Matsuura peninsula, which faced the Korean Strait and offered a short sea route to the peninsula. Hideyoshi himself stayed at the castle during the early phase of the invasion, directing logistics and troop movements from the site.

The castle functioned as the administrative and military hub for the entire invasion effort. Daimyō from across Japan were summoned to Nagoya, and their contingents assembled there before crossing to Korea. The scale of the operation made the castle one of the largest military installations of its time in Japan, with extensive earthworks and a sprawling compound designed to hold thousands of soldiers.

After the invasions ended in 1598, the castle lost its strategic purpose. Hideyoshi died that same year, and the political situation shifted rapidly. The castle was abandoned, and its wooden structures were either dismantled or left to decay. Over the following centuries, the site fell into ruin, leaving only the stone foundations and earthen ramparts visible on the hill.

What Stands There Today

No original historic structures of Nagoya Castle remain. What survives is the castle’s ruined foundation, including stone walls, moats, and the terraced layout of the inner and outer baileys. These remnants were designated a National Historic Site in 1926 and elevated to a Special Historic Site in 1955. The area under official protection was expanded in 2000.

A museum dedicated to the history of Japanese–Korean relations is located near the castle site. The museum covers the invasions, the cultural exchanges that followed, and the broader diplomatic and military contacts between the two countries. Visitors can walk the castle grounds and view the surviving earthworks, which give a sense of the original scale of the fortress.

The Name in Japanese

The castle’s name in Japanese is 名護屋城, read in kana as なごやじょう, and in romaji as Nagoya-jō. The word jō (城) means “castle” and is the standard suffix for castle names.

The name breaks down character by character as follows:

• 名 (な, na): “name” or “renown.” In this word it contributes the initial sound na.
• 護 (ご, go): “to protect” or “to guard.” Here it provides the go sound.
• 屋 (や, ya): “roof” or “shop.” In place names it often appears as a phonetic element, here supplying the ya sound.
• 城 (じょう, jō): “castle.” This is the common suffix for Japanese fortifications.

The reading なごや is a jukujikun, a case where the kanji are read as a unit rather than character by character. The individual meanings of 名, 護, and 屋 do not combine to form a literal phrase like “name-protect-roof castle.” Instead, the characters were chosen to represent the sound Nagoya, which was the name of the location. The same reading and characters are shared with the more famous Nagoya Castle in Aichi Prefecture, which is why the Saga castle is often prefixed with Hizen to avoid confusion.

Visiting and Context

The castle site is located in the Chinzei neighborhood of Karatsu, Saga Prefecture. It sits on a hill in the center of the Higashi Matsuura peninsula, about 10 kilometers north of Karatsu city. The ruins are open to the public, and the nearby museum provides context for the castle’s role in the Korean invasions.

Nagoya Castle is listed as one of the 100 Fine Castles of Japan, a selection of historically significant castles across the country. The designation reflects the site’s importance despite the absence of standing structures. For visitors interested in the Azuchi–Momoyama period, the castle offers a direct connection to Hideyoshi’s ambitious overseas campaigns, a rare physical remnant of that brief but consequential era.