Guida
Mizuki Ruins is an ancient fortress built in the 7th century, spanning across Onojo City, Dazaifu City, and Kasuga City in Fukuoka Prefecture. Designated as a Special Historic Site of Japan, it showcases massive remains that demonstrate the advanced civil engineering of the era. The site features a wide moat approximately 60m wide and a double-layered earthen embankment reaching 1.2km in length and 9m in height, serving as a large-scale defense system integrated with the natural terrain.
The history of Mizuki is deeply connected to the Battle of Baekgang in 663. Following the fall of Baekje to the Tang and Silla forces in 660, Japan sent troops to assist, but suffered a decisive defeat. In 664, shortly after this event, Mizuki was constructed as a vital defensive stronghold to protect Dazaifu. The 'Nihon Shoki' chronicles that a great embankment was built in Chikushi to store water, naming it 'Mizuki' (Water Castle). This indicates it was not just a wall, but a sophisticated water-based defense system. As Dazaifu developed, Mizuki played a crucial role in guarding its outer perimeter.
The most striking feature is the vast expanse of the moat and earthen embankments. The 'East Gate Site' is particularly significant, as it once served as a gateway to Dazaifu. This location was the terminus of the road connecting Hakata and Dazaifu (Sanyo-do/Dazaifu-do), where officials from the Imperial Court were greeted or seen off. Scenes of these arrivals and departures are even immortalized in the 'Man'yoshu', Japan's oldest poetry collection. Visitors can find Man'yoshu stone monuments around the site, providing a poetic connection to the past.
As a site set within a rich natural environment, Mizuki Ruins offers different views depending on the season. Because visiting involves walking across large areas of uneven terrain, it is best to visit during pleasant weather. The lush greenery during the warmer months provides a beautiful backdrop to the ancient earthen walls, creating a serene atmosphere for contemplation.
Visitors can walk through the vast grounds to experience the scale of ancient engineering. A highlight is visiting the Man'yoshu monuments related to the 'Chikushi Manyo Poetry' sites, offering a chance to touch the literature and culture of ancient Japan. Walking through the East Gate Site allows you to visually understand the historical role of this place as a site of both military defense and human encounters.
The area around Mizuki Ruins is rich in history, especially regarding the Dazaifu region. Nearby sites like Mutsuki Shrine are closely related to the historical context of this area. You can easily incorporate a visit to the Mizuki Ruins into a broader historical sightseeing route through Dazaifu and Fukuoka.
Since the ruins are located in an expansive outdoor area with natural terrain, please wear comfortable clothing and sturdy walking shoes.