
Guida
The Heianko Historic District, located in Hagi City, Yamaguchi Prefecture, is a remarkably preserved area that vividly showcases the architectural style of samurai residences from the Edo period. Situated south of the outer moat of the former Hagi Castle, the district maintains the structural layout of a classic warrior residence area. The most striking feature is the long, continuous earthen walls known as 'Kaimagari' (unique curved walls). These walls create a rhythmic and orderly landscape characteristic of a traditional castle town. Visitors can see surviving main houses, long gates (Nagayamon), and storehouses (Dozo) that offer a visual connection to the history of the feudal domain.
The history of this district is deeply intertwined with the construction of Hagi Castle in 1604. As a vital part of the Choshu Clan's stronghold, the Heianko area was developed as a residential district for the samurai class. During the Edo period, the layout of residences was strictly organized according to social rank. Although the area suffered from a significant fire in 1682, the subsequent reconstruction helped maintain its historical identity. In 1976, the Heianko and Horiuchi districts were designated as one of Japan's earliest 'Important Preservation Districts for Groups of Traditional Buildings.' This designation highlights the area's significance in preserving Japan's traditional urban structures and architectural heritage for future generations.

The primary allure of the Heianko District is the seamless integration of long earthen walls and samurai architecture. The scenery along the Hashimoto River reflects the land division patterns of the Edo period, providing a sense of the spatial scale of ancient life. Specifically, 11 historic buildings and 39 earthen walls and gates are officially designated as cultural assets. The unique curves of the 'Kaimagari' walls offer a distinctive photographic subject found nowhere else. The way the residences are positioned according to the natural terrain also demonstrates the sophisticated urban planning of the era.
As this is an open-air walking area, the atmosphere changes beautifully depending on when you visit. During the bright daylight hours, you can clearly observe the textures of the earthen walls and the intricate details of the traditional architecture. At dusk, the streets take on a nostalgic, poetic atmosphere. The district is also beautiful throughout the seasons; observing how the changing colors of nature harmonize with the weathered textures of the old walls and buildings is a wonderful way to experience the passage of time.

The best way to experience Heianko is through a leisurely stroll. Walking along the well-maintained paths, you can immerse yourself in the Edo-period atmosphere while admiring the gates and residences. To get a complete picture of Hagi's history, we recommend combining this walk with visits to the Hagi Castle ruins and sites related to the 'Heritage of Industrial Japan' (a UNESCO World Heritage site). It is a perfect place for quiet reflection on traditional Japanese living styles and spatial design.
Several iconic landmarks are located near the Heianko District. These include the Hagi Castle ruins at the foot of Mt. Shizuki, the Meirinkan (a former samurai school), and the Hagi Reflection Furnace (part of the World Heritage site). Exploring these sites alongside the Horiuchi District will allow you to trace the full history of the Hagi castle town culture.