Kochi Castle

Kochi Castle, located in the center of Kochi City in Kochi Prefecture, is one of Japan’s most celebrated surviving castles. After Yamauchi Kazutoyo, who distinguished himself in the Battle of Sekigahara, was granted the entire Tosa domain—valued at 240,000 koku—by Tokugawa Ieyasu, he began construction of the castle in 1601. It was completed in 1611. The castle was built on the site of Otakasa Castle, which had existed during the Nanboku-cho period. The Yamauchi family ruled the Tosa domain for approximately 260 years, across 16 generations, until the Meiji Restoration.

In 1727, a major fire in the castle town destroyed nearly all of the buildings except the Otemon Gate. Reconstruction began in 1729, and by 1753 the castle had been rebuilt to closely resemble its original appearance. It subsequently survived numerous threats, including the 1873 edict abolishing castles and the Pacific War, and its historic buildings remain in remarkably good condition today. Because of its graceful appearance, Kochi Castle is also known as “the finest castle in the Nankaido region.”

Kochi Castle is one of Japan’s only 12 surviving original castle keeps. It also holds exceptional historical value as the only castle in Japan where an Edo-period keep, the honmaru palace—known as Kaitokukan—and the other buildings of the main bailey have survived together as an integrated complex. Fifteen structures, including the keep, the honmaru palace, and the Otemon Gate, have been designated Important Cultural Properties of Japan. Only three castles in Japan—Kochi Castle, Marugame Castle, and Hirosaki Castle—retain both their original Otemon Gate and castle keep. The view of the keep framed beyond the Otemon Gate is one of Kochi Castle’s most popular photographic scenes.

The keep is a watchtower-style structure with three stories on the exterior and six floors inside. From the top floor, visitors can enjoy a 360-degree panorama encompassing Kochi City, the Kagami River, and distant mountains. Inside the keep, steep staircases, massive beams, and other features preserve Edo-period construction techniques. The honmaru palace showcases beautiful designs and defensive features, including the “divided waves” ranma transom, which depicts the rough seas of Tosa, as well as hidden chambers for warriors.

Although Kochi Castle was never used in actual battle, it was built with defense as a priority. The keep and Otemon Gate retain numerous features characteristic of castles from the Warring States period, including ishiootoshi openings for dropping stones onto attackers, sama loopholes for firing arrows and guns, and shinobi-gaeshi, or anti-climbing spikes—one of the few surviving examples in Japan. The Tsumemon, a bridge corridor connecting the honmaru and ninomaru baileys, is also known for being the only surviving structure of its kind in Japan that spans a dry moat.

The castle’s stone walls are another highlight. Most were built using nozura-zukuri, a technique that uses naturally shaped stones, providing excellent drainage and durability. In the sannomaru bailey, visitors can also see beautiful uchikomi-hagi stonework, in which roughly shaped stones are fitted closely together, offering an up-close look at the advanced masonry techniques of the time.

Kochi Castle is also known by the nickname “Takajo,” or “Hawk Castle.” The name comes from the way the white walls finished with Tosa plaster and the gray roof tiles resemble the beautiful plumage of a hawk. In 2014, the castle was recognized by the Night View Tourism Convention & Bureau as one of Japan’s “Three Great Night Castles.” At night, the keep is illuminated, and projection mapping is presented during special events, creating a fantastical appearance unlike its daytime scenery.

Within the castle grounds stand statues of Yamauchi Kazutoyo, the founder of the castle, and his wife, Chiyo, who is renowned for her support of her husband, as well as a statue of Itagaki Taisuke, a leader of the Freedom and People’s Rights Movement. These landmarks offer insight into the history of Kochi Prefecture. Located just beside the castle, the Kochi Castle History Museum displays historical documents and fine arts and crafts associated with the Yamauchi family. Its observation area, offering a panoramic view of Kochi Castle and the Otemon Gate, is also popular.

In front of the Otemon Gate, the Sunday Market is held every week and has a history of more than 300 years. Visitors can enjoy fresh local vegetables, regional cuisine, and specialty products unique to Kochi. With its rich historical significance, beautiful keep, defensive structures, stone walls, nighttime scenery, and surrounding attractions, Kochi Castle is one of Kochi Prefecture’s foremost tourist destinations. As a valuable cultural heritage site that conveys Japan’s castle culture and the history of Tosa to the present day, it continues to attract visitors from around the world.