Plans by the Japanese government to build a huge series of seawalls to protect tsunami affected areas have been attacked by local critics as a costly waste of time.

Just months following the devastating tsunami of March 2011, the Japanese government announced it would build a vast array of sea walls to protect vulnerable coastal regions in future. Under the plan, a total of 440 walls standing nearly 15 metres in height would be constructed across Fukushima, Miyagi and Iwate – the prefectures…