Nirengi Castle

Overview

Nirengi Castle (二連木城, Nirengi-jō) was a Japanese castle in what is now the city of Toyohashi, in Aichi Prefecture. It was founded in 1493, in the second year of the Meiō era (明応, Meiō), during the Muromachi period (1336–1573). The site lies at roughly 34.77° north, 137.41° east, in the coastal plain of eastern Aichi.

No buildings from the castle survive. The grounds have been turned into a public park, and the city has erected a stone monument and explanatory signboards on the site. The castle is also remembered through the Siege of Nirengi Castle, the military action fought over it.

History

Nirengi Castle was established in 1493. That date places its foundation in the final decades of the Muromachi period, an age when the authority of the Ashikaga shoguns in Kyoto had collapsed and power had fragmented among regional warlords. Castles of this kind were built and rebuilt constantly as local families fought over land, roads and allegiances.

The castle stood in Mikawa Province, the region that corresponds to modern Aichi Prefecture east of Nagoya. Mikawa was contested ground throughout the sixteenth century, and Toyohashi sat on the main road between Kyoto and the east. A fortification at Nirengi controlled a stretch of that landscape.

The written record associates the castle with the Siege of Nirengi Castle, the engagement in which it was fought over. The castle was a working fortification rather than a monument: it was built for defence, held by a garrison, and changed hands by force.

What Stands There Today

Nothing of the original castle remains above ground. In its place is a park, laid out on the footprint of the former castle grounds. The city of Toyohashi has placed a stone monument at the site and installed explanatory signboards that set out the castle's history for visitors.

For a reader of Japanese, these signboards are worth a look. Castle markers and local history boards are written in a compact, formal register full of set phrases — 城主 (jōshu, castle lord), 落城 (rakujō, the fall of a castle), 築城 (chikujō, the building of a castle) — that recur in Japanese historical writing and in the historical dramas and novels that draw on it.

The Name in Japanese

The castle's name is written 二連木城 and read にれんぎじょう (Nirengi-jō).

The reading is the first thing to notice. Written plainly, the three kanji 二・連・木 would suggest something like ni-ren-ki or futatsu-ren-ki. The actual reading, Nirengi, does not match the characters sound for sound. This is a common pattern in Japanese place names: the kanji record a meaning or an older form of the name, while the spoken name has drifted or been compressed over centuries. Learners who try to decode every place name character by character will be misled by names like this one.

Character by character:

• 二 — read に (ni) here. It means "two". This is the ordinary numeral, the same character used in 二つ (futatsu, two things) and 二人 (futari, two people). In this name it is read with its short Chinese-derived sound rather than the native Japanese counting word.
• 連 — read れん (ren) here. It means "to link", "to connect", or "a series/row". It appears in everyday words such as 連絡 (renraku, contact, communication) and 連続 (renzoku, continuity). In this name it is tied to the old word for the elm trees that once grew in the area, 連の木 (ren-no-ki).
• 木 — read ぎ (gi) here, voiced from ki. It means "tree" or "wood". This is one of the most familiar kanji in Japanese, seen in 木曜日 (mokuyōbi, Thursday) and 木村 (Kimura, a common surname). Its voicing to gi is a regular sound change when a character sits inside a compound.
• 城 — read じょう (jō) here. It means "castle". It is the standard suffix for castle names across Japan: 大阪城 (Ōsaka-jō), 姫路城 (Himeji-jō), 熊本城 (Kumamoto-jō). The same character is read shiro when it stands alone as a common noun meaning "castle".

Put together, the name means "Two Elm Trees Castle". The surrounding district carries the same name, Nirengi, taken from the elm trees — 連の木 (ren-no-ki) — that once grew abundantly in the area. The written form 二連木 compresses "two" and "elm tree" into three characters, and the spoken form compresses them further into Nirengi.

Visiting and Context

The site is in Toyohashi, a city in southern Aichi Prefecture. Toyohashi is a stop on the Tōkaidō Shinkansen and the Tōkaidō Main Line, which makes the area easy to reach from Nagoya, Hamamatsu or Tokyo. The castle park, its stone monument and its signboards are the visible remains of the site.

Toyohashi rewards a little historical framing. The city grew up around Yoshida Castle (吉田城, Yoshida-jō), a Tokugawa-era stronghold, and Nirengi belongs to an earlier layer of the region's history — the fragmented, violent decades of the late Muromachi period, before the unification of Japan under Oda Nobunaga and Toyotomi Hideyoshi. A visitor who has seen the surviving stone walls of Yoshida Castle will find Nirengi a different kind of site: a flat park with a marker, where the history has to be read rather than seen.

The vocabulary of the site is useful in itself. Words such as 城跡 (shiroato, castle ruins), 石碑 (sekihi, stone monument), 説明板 (setsumeiban, explanatory board) and 公園 (kōen, park) appear on signboards at historic sites throughout Japan, and Nirengi is a good place to meet them in the field.