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Kuzuka Kofun is one of the most significant decorated burial mounds in Eastern Japan, located in Hitachinaka City, Ibaraki Prefecture. It is a nationally designated historic site and a keyhole-shaped mound (zenpokoenfun) constructed in the early 7th century. The most striking feature is the colorful murals inside the stone chamber. Using red pigment (bengala) on white clay walls, ancient artists depicted intricate geometric patterns, swords, shields, and horse gear. The surrounding area is maintained as a historic park, allowing visitors to observe the exterior of the mound and the serene landscape at any time.
The mound is believed to have been constructed during the late Kofun period in the early 7th century. It gained fame following a 1973 excavation, which confirmed it as one of the first decorated tombs discovered in Japan. Because the stone chamber remained sealed for centuries, the murals have been exceptionally well-preserved. Excavated artifacts, including small swords, iron-tipped weapons, and remains of an adult male, provide vital clues to the burial customs and lifestyle of the era. Many of these items are designated as cultural properties of Hitachinaka City.
The primary attraction is the mural art within the stone chamber. While access to the actual murals is strictly limited to specific periods, a high-quality, full-scale replica is available in the exhibition facility, allowing you to observe the delicate patterns and iconography up close. You can also view the distinctive keyhole shape of the mound and the surrounding moats that once defined its structure. The exhibition center also showcases authentic weapons and tools unearthed from the site.
Access to the actual murals inside the stone chamber is limited to only two periods per year: spring and autumn. During the spring opening, hours are 9:00–16:30, and during the autumn opening, they are 9:00–16:00. It is highly recommended to plan your visit around these specific seasons to see the real art. Outside of these periods, the historic park remains open for strolls, offering a peaceful way to enjoy the historical landscape and the natural surroundings during the bright daylight hours.
Adjacent to the Hitachinaka City Archaeological Research Center, visitors can explore deep archaeological exhibits. Through the life-sized replica of the stone chamber, you can experience the vibrant world of ancient colors. The center also hosts archaeological lectures about four times a year; checking the schedule in advance is a great way to deepen your knowledge. Walking through the site allows you to physically experience the ancient topography and structure.
The site is developed as the 'Kuzuka Kofun Historic Park,' a quiet environment surrounded by nature. The area also houses the Isogoro-ana lateral pit graves (a national historic site), one of the largest groups of lateral pit graves in Eastern Japan. This makes the area a perfect destination for a quiet, historical exploration amidst a blend of nature and local scenery.