Japanese Castles in Korea

I am aware of the Toyotomi campaign in Korea but I was pleasantly unaware to the extent of the construction of so many castles in the attempt to defend the Japanese held territory in Korea. Lets look a bit more at the Toyotomi Hideyoshi campaign back in the 16th Century.

The seven year Imjin War at the end of the 16th century was East Asia’s largest ever engagement of troops. After quickly capturing Busan, Japan’s scorched earth policy laid waste from here to Pyongyang until Ming Chinese forces entered the war to protect their suzerain status over Korea. This forced the Japanese troops to dig in with a series of castles –remnants of which can still be seen today.

BUSAN, South Korea — On the morning of May 23rd, 1592, at the order of Japanese general Toyotomi Hideyoshi, approximately 158,000 troops set sail from Tsushima, aboard hundreds of ships, for the port of Busan. It was the first of what would be the two major invasions of the seven-year Imjin War.

After being rebuffed on numerous diplomatic missions seeking passage for his troops across the peninsula into China, Hideyoshi elected instead to first conquer Joseon Dynasty Korea before invading Ming Dynasty China.

Once again, Busan would serve as the launching point for war between Chinese and Japanese forces on each other’s mainland. The last engagement took place 300 years earlier when Mongol-led Yuan Dynasty forces launched the first of two failed campaigns against Japan from the port of Busan—the first in 1274 and the second in 1281. By two phenomenal strokes of luck, the Chinese invasions were twice foiled by typhoons—which the Japanese afterwards dubbed the “Divine Wind” or, as spoken in the Japanese tongue, “Kamikaze.”

This time, it would be the Japanese using Busan to launch their attack on the Chinese homeland.

Japanese troops arrived just after sundown, following a day-long journey at sea. Armed with Portuguese firearm technology and troops battle-hardened by years of civil war at home, the Japanese quickly routed the bow and arrow-wielding Busan forces before beginning the long march towards Seoul. Three months later, Hideyoshi’s troops controlled several strategic cities, while maintaining a vulnerable supply line from Busan to Pyongyang. Civilian populations were most harshly affected by the Japanese troop’s use of scorched earth tactics that sought to destroy nearly all in their path.

Along with the strategically inept Joseon policy which forbade local commanders from engaging a foreign invasion force until a court-appointed general could arrive from Seoul with royal troops, Joseon additionally suffered under the weight of internal dissent by Koreans known as Baekjeong (Koreans of the lowest social rank; similar to India’s “untouchables”). Many Baekjeong viewed the Japanese as liberators from the harsh Korean feudal system and took advantage of the sudden loss of domestic security by setting fire to government buildings—including those where status ledgers for Korean slaves had been held.

Ming Forces Take the Field

Chinese forces soon entered the conflict, intent on protecting their suzerain status over Joseon Dynasty Korea. As Kenneth Swope writes in the Sungkyun Journal of East Asian Studies, Korean rulers of the era had little say as to how their fate would play out between the two warring powers.

“At this point in 1593, the war entered a stalemate during which intrigues and negotiations failed to produce a settlement. As the suzerain of Joseon Korea, Ming China exercised tight control over the Koreans during the war. At the same time, Ming China negotiated bilaterally with Japan while often ignoring the wishes of the Korean government.”

Japan, following failed peace negotiations with the Ming Dynasty, invaded Korea for a second time in 1597. Hampered by the heroic efforts of Korean Admiral Yi Sun-shin and his fleet, Japanese supply lines suffered heavily during the second campaign. With large numbers of Chinese troops pouring in from the north, and Korean guerilla warfare activity, the Japanese were forced to expand construction of fortresses across the southeastern part of peninsula in an effort to maintain what they had captured. Over the course of the war, a total of 35 castles were erected, either from scratch or from the remains of conquered Korean fortresses.

“The wajō line was essentially a response to the Chinese advance, and provided the last refuge for the occupying troops,” writes Turnbull. “The new fortresses may have had roles concerned with communications and harbour defence, but the principle underlying their creation was that of providing a final toehold on the Korean Peninsula.”

Remnants of the Past

Of the 35 castles constructed by Japanese forces, little more than fragments remain of most. A great place to get an idea of the structures that once straddled the Korean coastal area is the Gijang Cultural Center just outside of Busan. There you can see a model of the Imrang Fortress, which stood on the eastern coast as the northernmost Japanese defensive post in what were a series of ten castles east of the Nakdong River in the Busan area.

The castles built in Korea were similar to the Japanese mainland style of the 16th and 17th century, with towering stone walls and a command tower perched on top. The Imrang Fortress was erected on a hill overlooking the beach and it included a lower residence area around the port, though little of that remains today.

Much like the Imrang Fortress, there are still bits and pieces of these 16th century strongholds out there for those curious to witness a page out of the Korean peninsula’s past. To see the most well-preserved castle, head further north to Ulsan for a tour of Seosaengpo. Built by Japanese General Kato Kiyomasa in 1592-1593 during the initial stages of the Imjin War, many of the original walls still remain intact.

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List of Castles in Korea and the time they were built.

Angolpo Castle 安骨浦倭城 안골왜성 1593
Bakmungu Castle 迫門口倭城 박문구왜성 1593
Busan Castle 釜山倭城 부산왜성 1592
Dongnae Castle 東莱倭城 동래왜성 1593
Dongsamdong Castle 東三洞倭城 동삼동왜성 1593
Gadeok Castle 加徳倭城 가덕왜성 1592
Gadeok Seongbuk Castle 加徳支城 가덕도왜성 1592
Gijang Castle 機張倭城 기장죽성리왜성 1593
Gimhae Jukdo Castle 金海竹島倭城 김해왜성 1593
Goseong Castle 固城倭城 고성왜성 1597
Gupo Castle 亀浦倭城 구포왜성 1593
Hizen Nagoya Castle 肥前名護屋城 히젠나고야성 1591
Hopo Castle 弧浦倭城 호포왜성
Imrangpo Castle 林浪浦倭城 임랑포왜성 1593
Jama Castle 子馬倭城 자마왜성
Jangmunpo Castle 長門浦倭城 장문포왜성 1593
Jaseongdae Castle 子城台倭城 자성대왜성 1593
Jisepo Castle 松真浦倭城 송진포왜성 1593
Katsumoto Castle 勝本城 성 1591
Masa Castle 馬沙倭城 마사왜성
Masan Castle 馬山倭城 마산왜성 1597
Myeongdong Castle 小山倭城 명동왜성 1593
Namhae Castle 南海倭城 남해왜성 1597
Sacheon Castle 泗川倭城 사천왜성 1597
Seosaengpo Castle 西生浦倭城 서생포왜성 1593
Shimizu Castle 清水城 시미즈성 1591
Sindap Castle 新沓倭城 신답왜성 1593
Suncheon Castle 順天倭城 순천왜성 1597
Ulsan Castle 蔚山倭城 울산왜성 1597
Ungcheon Castle 熊川倭城 웅천왜성 1592
Waeseongdong Castle 倭城洞城 왜성동성 1597
Yangsan Castle 梁山倭城 양산왜성 1597
Yeongdeungpo Castle 永登浦倭城 영등포왜성 1592

Source – Bobby McGill, Forgotten Castles.

For more information and a great interactive map. http://wajo.japanese-castle-explorer.com/map.html

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