Odawara Castle

The Remnants of the Five Generations of Gohojo Clan
The "Odawara Castle," the Biggest Castle in the Warring States

The Odawara Castle is located at a key point of the Tokaido Road overlooking the Sagami Bay.
As the base of the five generations of the Odawara-Hojo clan beginning with Sozui Ise (normally known as Soun Hojo), the impregnable castle overcame the sieges by Kenshin Uesugi and Shingen Takeda. It was a huge castle with "Sogamae," the outer enclosure, that the total length was 9 kilometers which run from Mt. Hachiman to the Sagami Bay.
However, its lord surrendered the castle due to the battle of Odawara with Hideyoshi Toyotomi followed by a lot of feudal lords. The warring states period ended.
The castle tower is mainly maintained as the castle ruins park now. You can freely observe the structure as a defensive facility, such as the "Tokiwagi-mon Gate," the "Akagane-mon Gate," and the moat filled with water.
Also, the current castle tower was renovated in 1960, and the inside is an exhibition facility of historical materials. Many visitors including tourists from abroad visit here and think about the history.

The Reborn Castle Tower
A Large-Scale Renovation in the "Heisei Era"

The castle tower with white walls shines brightly, reflecting the sunlight.
A large-scale renovation was implemented from 2015 to 2016 due to deterioration. The entire wall was repainted, with the construction such as anti-earthquake reinforcement.
Our lime plaster paint was used for that.
The wall paint makes the most of the excellent functions without losing the taste, taking advantage of the original functions of lime plaster that has been used from the old days. Therefore, the walls of the castle have the strength to withstand the wind and rain in the coastal area, keeping the elegance.
The castle will keep the appearance shining white in the views through the four seasons.

You can observe the ancient technologies in the park as there is an exhibition that shows the structure of the plastered white wall at the first construction.

You can observe the ancient technologies in the park as there is an exhibition that shows the structure of the plastered white wall at the first construction.

What is Lime Plaster, a Japanese Traditional Material?
Gift From the Ancient Sea

Coral reefs on the sea floor absorb carbon dioxide in the sea with co-existing bacteria. By doing so, they make the calcareous (calcium) skeleton.
Slaked lime is the main ingredient of lime plaster. It is produced by heating and slaking limestone which was produced from coral reefs in the ancient sea.
Japan, an island country, has plenty it. Also, it is one of the few resources that can be produced in the country.
Therefore, lime plaster has been used for many buildings from the old days, as a traditional material and wall paint. It has many excellent functions, such as anti-mold properties with alkalinity, moisture absorption and release properties with the microporous structure, and the unique taste and texture of the natural material. These effects have been reevaluated recently.
However, traditional painting with lime plaster took time as it required advanced plastering skills.
Our lime plaster paint enabled the work with general painting methods and realized using the original functions of lime plaster in daily life.