The sea wall project demonstrates how not even the most precious ecological treasures can survive Japan's construction obsession, which has long been its answer to the threat of natural disaster — and a vital source of economic stimulus and political capital, especially in rural areas. But the plan to erect the concrete berm on the pristine beach, a vanishingly rare commodity in Japan, is not just about money or votes. It has torn the village apart as residents fight deeper forces remaking rural Japan: climate change, ageing populations and the hollowing-out of small towns. The project's supporters — a majority of its 20 residents — say the village's survival is at stake, as it has been lashed by fiercer storms in recent years. Opponents — a collection of surfers, organic farmers, musicians and environmentalists, many from off the island — argue a sea wall would destroy the beach and its delicate ecosystem. Leading the opposition is Jean-Marc Takaki, 48, a half-Japanese Parisian who moved into a bungalow behind the beach last year. A nature guide and former computer programmer, Mr Takaki began campaigning against the wall in 2015, after moving to a nearby town to be closer to nature.