The nickname 'Kijo' (Turtle Castle) refers to how the fortress appears to float on the surrounding moats.
It is one of the few remaining examples of a flatland castle (hirajiro) in the Kanto region.
The castle served as the administrative headquarters for the Tsuchiura Domain throughout the Edo period.
The East Gate, originally built in the 17th century, is one of the oldest wooden structures preserved on-site.
The Tsuchiya family, who ruled the domain, were prominent Shogunate officials, which influenced the castle's maintenance and prestige.
Tsuchiura Castle, also known as Kijo or Turtle Castle, is a historic site in Ibaraki Prefecture characterized by its unique water-moat defense system that gives the impression of a floating turtle. The castle ruins are now maintained as Kijo Park, preserving key structural elements from the Edo period. It served as the seat of the Tsuchiura Domain, controlled by various influential daimyos including the Tsuchiya clan. The surviving structures include the East Gate and the Kasumi Gate, both designated as Important Cultural Properties of Ibaraki Prefecture. Its defensive layout was strategically planned to overlook Lake Kasumigaura. The site features reconstructed moats and earthworks that highlight feudal-era Japanese military architecture. The grounds are integrated with the local urban layout, serving as both a historical monument and a public green space.
The East Gate entrance, especially during the cherry blossom season when the trees frame the wooden architecture.
Combine your visit with a walk around the adjacent Lake Kasumigaura shore.
Look for the informational plaques in English that explain the strategic positioning of the moats.
Visit during spring to see the historic gate framed by blooming cherry blossoms.
Do not mistake the modern city buildings nearby for historical castle structures.
The park grounds are generally accessible year-round, but specific gate interiors may have seasonal access restrictions.
Maintain a quiet volume as it is a public park space; stay on marked paths to protect earthworks.
