The Great Wall of Japan

101 East investigates the controversies surrounding the building of Japan's enormous tsunami wall.

After the 2011 Fukushima earthquake and tsunami killed about 18,000 people, the Japanese authorities embarked on a radical plan.

At a cost of $12bn, they are building a 15-metre-high anti-tsunami wall across 400 kilometres to divide the land from the ocean.

But it is also dividing local communities.