Oda Nobunaga: The Warlord Who Began Unification

A bold sixteenth-century lord from Owari reshaped castles, markets and warfare, and left a trail of places that are easy to visit today.

Published October 18, 2026 at 11:36 PM JST | By Tokyo Paul

Quick answer: Oda Nobunaga (1534 to 1582) was a daimyo from Owari Province, now part of Aichi, who began the unification of Japan during the Sengoku period. He is known for rising to power after the Battle of Okehazama, adopting firearms, promoting open markets and building Azuchi Castle. Gifu, Nagoya and Shiga offer sites linked to him.

Early Life and Rise

Nobunaga was born in 1534 into the Oda family, a regional power in Owari Province, in what is now Aichi Prefecture. As a young man, he gained a reputation for unconventional behaviour and style, and later accounts describe him as bold and forward-looking. He took over his family's leadership while still young. His early reputation grew with the Battle of Okehazama in 1560, when his smaller force defeated the army of a much larger neighbouring lord. The victory made him a figure to watch and gave him room to expand.

Historians still discuss the details, but its importance in his story is clear. From there, he extended his influence through alliances and campaigns. His ally Tokugawa Ieyasu and his capable retainers, including Toyotomi Hideyoshi, supported his rise. In 1568, he entered Kyoto in support of a claimant to the shogunate, placing himself at the centre of national politics. Many Japanese television dramas and novels begin his story in these years, which keeps his early life well known.

Innovations in Warfare and Administration

Nobunaga is often remembered for his use of firearms. Matchlock guns reached Japan in the sixteenth century, and he organised their use effectively in battle, most famously at Nagashino in 1575. Historians continue to refine the details, but his willingness to adopt new technology is widely recognised. He also experimented with administration. In towns under his control, he encouraged open markets and reduced barriers that limited trade, policies often referred to as rakuichi-rakuza.

The aim was to stimulate commerce and strengthen his base. He improved roads and removed some checkpoints to ease movement. His castles were not only defensive but also symbols of power. They combined strong stone foundations with tall central keeps and decorated interiors, a model that influenced later castle design across Japan. Together, these changes made his domain stronger and more connected than many of its neighbours. Visitors to Nagashino can see exhibits about the era's weapons and tactics.

Azuchi Castle

Azuchi Castle, built from 1576 on the shore of Lake Biwa in what is now Shiga Prefecture, was Nobunaga's grand statement. Records describe a tall keep with rich decoration and views over the lake. It was a centre of administration and a showcase for visitors. The castle stood for only a few years, and the original structure no longer remains. Today, visitors can walk the site's stone steps, see foundations and explore a nearby museum and reconstructed elements.

The setting beside the lake is pleasant, especially in spring and autumn. Azuchi is accessible from the Omihachiman area, and combining it with a stroll through the canal district of Omihachiman makes a satisfying day. Check official information for opening times and any seasonal changes. A model and exhibits at the nearby museum help visitors picture what the keep may have looked like. The hillside path, lined with old stone steps, is the highlight of a visit.

Gifu and the City of His Name

In 1567, Nobunaga took Inabayama Castle and renamed the area Gifu, a name that still marks the city and prefecture. Gifu Castle sits on a hilltop above the city, reached by a ropeway, and offers wide views. The area is also known for cormorant fishing on the Nagara River in summer. Tradition links Nobunaga with support for the cormorant fishing, and visitors can watch the nighttime fishing demonstrations from boats in the season.

Check the official schedule and booking details for the current year. Sweetfish, called ayu, is the local seasonal speciality. Gifu's historic quarters and museums add context. The city holds events celebrating Nobunaga, and shops offer related souvenirs. It is an easy day trip from Nagoya by train. The hilltop castle is particularly pleasant at sunset, when the river and plain are lit by low light.

Nagoya and the Owari Region

Nobunaga's home territory lay around present-day Nagoya. Kiyosu Castle, where he once based himself, and Nagoya Castle, built later by the Tokugawa, are associated with the region's warrior heritage. Nagoya's autumn festival features a parade of historical figures including Nobunaga, Hideyoshi and Ieyasu. Nagoya is also known for local dishes such as miso katsu, hitsumabushi grilled eel, and tebasaki chicken wings. After a day of history, these provide a hearty meal.

Museums and castles in the city give more background on the era. Okehazama, the site of his early victory, is in the area between Nagoya and Toyoake, and memorials mark the spot. Visiting is simple by local transport and suits those interested in the story. Autumn is a pleasant season for these visits, with cooler air and clear skies. A castle visit followed by a local meal makes a satisfying plan for a day.

Culture and Tea

Nobunaga was a patron of the arts and a lover of tea. He collected fine tea utensils and supported tea masters, setting a trend that Hideyoshi later continued. Tea gatherings became part of the political and cultural life of the elite. He was also curious about foreign things. He met missionaries and showed interest in items such as European clothing, clocks and maps.

Such curiosity fits with his reputation for fresh thinking. Museums sometimes display objects connected with this world, such as tea bowls, armour and screens. Look for special exhibitions, and check official sites for details. Such details help explain why later tea masters and collectors looked back to this period with admiration. Collectors still prize tea bowls associated with the warlords of this era.

His Legacy

Nobunaga's career ended in 1582 at Honno-ji temple in Kyoto, before the unification of Japan was complete. His retainers, notably Hideyoshi, continued the work, and Ieyasu eventually founded the long-lasting Tokugawa shogunate. The three are often discussed together as the unifiers. A popular saying compares them with a cuckoo bird: Nobunaga would make it sing, Hideyoshi would coax it, and Ieyasu would wait. The saying is a playful way of describing their different styles.

Nobunaga remains a favourite figure in Japanese novels, films, games and anime. His image as a bold innovator appeals to many. For visitors, following his trail through Gifu, Nagoya and Shiga offers a lively way to explore the history of the Sengoku period. Several annual festivals in Gifu and Nagoya feature costumed parades honouring him. Local museums in Gifu, Nagoya and Shiga all offer background on his life.

Frequently Asked Questions

Who was Oda Nobunaga?

He was a sixteenth-century daimyo from Owari Province who began the unification of Japan. He is known for victory at Okehazama, his use of firearms, open markets and Azuchi Castle. He began the process that his successors completed. Museums and castles in Gifu, Nagoya and Shiga keep his story alive for visitors.

Where can places linked to Nobunaga be seen?

Gifu Castle in Gifu, Azuchi Castle ruins in Shiga, and sites around Nagoya and Kiyosu all connect to him. Check official sites for opening details and transport information. A day trip from Nagoya covers several of them comfortably. Most are reachable by regional trains and short bus rides from major cities.

How is Nobunaga different from Hideyoshi and Ieyasu?

Nobunaga began unification with bold reforms, Hideyoshi continued and largely completed it, and Ieyasu established the Tokugawa shogunate. They are often discussed together as the three unifiers. Together they are often called the three unifiers of Japan. Their stories are closely linked, and many museums present them together.

Keep Exploring

More guides from Tokyo Paul: Toyotomi Hideyoshi: From Farmer to Ruler of Japan, Sankin-Kotai: The System That Shaped Edo and The Meiji Restoration: Japan Modernizes in a Generation.