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Exploring Kiyosu Castle: Oda Nobunaga’s Early Stronghold in Aichi

Oda Nobunaga in samurai armor during a thunderstorm in a hilly landscape.

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In Kiyosu, Aichi Prefecture, stands a reconstructed symbol of Japan’s tumultuous samurai past—Kiyosu Castle. This fortress was once the stronghold of Oda Nobunaga, a pivotal figure in Japan’s Sengoku period, who used it as a base to launch his campaign to unify the nation.

au château de Kiyosu
“Kiyosu Castle (Kiyosu Aichi) VLux5 hdsr 100” by Hyppolyte de Saint-Rambert, CC BY 4.0, via Wikimedia Commons

Introduction to Kiyosu Castle and Its Samurai Legacy

FACT: What the records say

Kiyosu Castle, originally constructed in the late 14th century, became a significant military and political center under the control of Oda Nobunaga in the 16th century. The castle’s strategic location in Owari Province made it a vital asset in Nobunaga’s rise to power. However, the original structure was dismantled around 1610 when the castle town was moved to Nagoya, and its materials were reused in constructing Nagoya Castle. Today, a reconstructed keep stands on the site, offering visitors a glimpse into the past.

Oda Nobunaga in samurai armor during a thunderstorm in a hilly landscape.
AI生成イメージ / AI-generated illustration (not a photograph of the actual place)

The Origins of the Fortress in Owari Province

FACT: The strategic importance of Kiyosu

Kiyosu Castle was initially built to control the surrounding region and protect the vital trade routes that passed through Owari Province. Its location by the Gojō River provided a natural defense and facilitated the movement of troops and supplies. The castle’s significance grew when Oda Nobunaga took control, turning it into a hub for his military operations.

FACT: The architectural significance

The original Kiyosu Castle was a masterpiece of medieval Japanese architecture, reflecting the era’s military needs and aesthetic values. Although the original structure no longer stands, the reconstructed keep captures the essence of the period, with its towering presence and traditional design. This reconstruction, completed in 1989, allows visitors to appreciate the grandeur and strategic design of samurai fortresses.

Kiyosu Castle 清洲城11 - panoramio - Kiyosu Castle, Otemon of Kiyosu Castle (Kiyosu Aichi)
“Kiyosu Castle 清洲城11 – panoramio” (Kiyosu Castle, Otemon of Kiyosu Castle (Kiyosu Aichi)) by baggio4ever, CC BY 3.0, source, via Wikimedia Commons

Oda Nobunaga Takes Command at Kiyosu

FACT: Nobunaga’s early years

Oda Nobunaga, known for his innovative military tactics and ambition to unify Japan, made Kiyosu Castle his base in the 1550s. From here, he launched several campaigns that would eventually lead to his dominance over central Japan. His time at Kiyosu marked the beginning of his rise as one of the most powerful daimyo of the Sengoku period.

FACT: Nobunaga’s military strategies

Nobunaga’s use of Kiyosu Castle as a base was strategic, allowing him to implement his revolutionary military strategies. He was known for his use of firearms, which were relatively new to Japan, and his ability to adapt Western military techniques to Japanese warfare. This adaptability and foresight were key to his success in battles such as Okehazama.

The Legendary Battle of Okehazama

FACT: A decisive victory

The Battle of Okehazama, fought on 12 June 1560, is one of the most famous battles in Japanese history. Despite being outnumbered ten to one, Nobunaga’s force of about 2,500 men defeated Imagawa Yoshimoto’s 25,000-strong army. This victory solidified Nobunaga’s reputation as a brilliant military strategist and set the stage for his future successes.

LEGEND: The role of divine intervention

According to local legend, Nobunaga’s victory at Okehazama was aided by a sudden thunderstorm that disoriented the Imagawa forces. This unexpected weather event is said to have given Nobunaga’s troops the cover they needed to launch a surprise attack, turning the tide of the battle in his favor. While historical records focus on Nobunaga’s tactical genius, this story highlights the role of nature and fate in samurai lore.

Kiyosu Castle - Kiyosu Castle
“Kiyosu Castle” (Kiyosu Castle) by de:Benutzer:Oliver Mayer, CC BY-SA 3.0, source, via Wikimedia Commons

What to See at the Reconstructed Kiyosu Castle Museum

FACT: Exploring the castle today

The reconstructed Kiyosu Castle, completed in 1989, serves as a museum dedicated to the history of the region and Nobunaga’s legacy. Visitors can explore exhibits featuring samurai armor, weapons, and artifacts from the Sengoku period. The castle’s observation deck offers panoramic views of the surrounding area, providing a sense of the strategic advantage the original site offered.

FACT: Exhibits and artifacts

Inside the museum, visitors can find a rich collection of artifacts that tell the story of Kiyosu Castle and its role in Japanese history. These include detailed models of the original castle, replicas of samurai armor, and displays of weapons used during the Sengoku period. These exhibits provide a tangible connection to the past, allowing visitors to immerse themselves in the era of samurai warfare.

Planning Your Visit from Nagoya

FACT: How to get there

Kiyosu Castle is easily accessible from Nagoya, making it a popular day trip destination. Visitors can take a train to Kiyosu Station on the JR Tokaido Main Line and walk approximately 15 minutes south to reach the castle. Alternatively, from Shin Kiyosu Station on the Meitetsu Nagoya Line, it’s about a 12-minute walk north. Free parking is available at the castle for those traveling by car.

Nearby Guide

Access

  • Kiyosu Station (Kiyosu) — From Kiyosu Station on the JR Tokaido Main Line, walk approximately 15 minutes south to reach Kiyosu Castle. official site
  • Shin Kiyosu Station (Kiyosu) — From Shin Kiyosu Station on the Meitetsu Nagoya Line, walk about 12 minutes north to the castle. official site
  • Parking at Kiyosu Castle (Kiyosu) — Free parking is available at Kiyosu Castle, accommodating 233 standard-size vehicles and 4 buses. Parking is open from 9:00 am to 5:00 pm. official site

Nearby sights

  • Kiyosu Castle Park (Kiyosu) — Adjacent to Kiyosu Castle, this park features a multipurpose field and is a popular spot for cherry blossom viewing during spring. official site
  • Kiyosu Kojo Ruins Park (Kiyosu) — Located across the Gojo River from the reconstructed castle keep, this park marks the original site of Kiyosu Castle and offers historical insights. details
  • Kiyosu City Arts and Culture Museum (Kiyosu) — Situated within the castle grounds, this museum showcases local arts and crafts, enhancing the cultural experience of visitors. official site

Where to stay

  • Hotel Route-Inn Kiyosu (Kiyosu) — A comfortable hotel offering modern amenities, located approximately 2 km from Kiyosu Castle, suitable for travelers seeking convenience and comfort. official site
  • Kiyosu City Hotel (Kiyosu) — A budget-friendly accommodation option situated near Kiyosu Station, providing easy access to local attractions and transportation. official site

Where to eat

  • Kiyosu Yaki (Kiyosu) — A local specialty dish featuring grilled eel, renowned for its rich flavor and tender texture, available at various restaurants in Kiyosu. official site
  • Kiyosu Castle Café (Kiyosu) — Located within the castle grounds, this café offers a variety of light meals and beverages, perfect for a relaxing break during your visit. official site
Locator map of Japan: Kiyosu, Aichi
Legend site: Kiyosu, Aichi — Source: Map of Japan with highlight on 23 Aichi prefecture.svg; Map: Lincun, CC BY-SA 3.0, via Wikimedia Commons

Related on JAPAN ESSENCE: Koshamain’s War: Exploring Hokkaido’s Medieval History in Kaminokuni | The Fall of the Late Hojo: Samurai Legacy and Legends in Kanto

Sources

To explore further, visit Onigawara Experience for hands-on onigawara experiences in Japan and Oni Kobo (鬼工房) for onigawara demon-tile art and charms.

About the author

JAPAN ESSENCE Editorial Team
Our mission is to bring you Japan’s legends, myths, festivals and living traditions, through both historical fact and the stories passed down over generations.

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