Japan: Ube Industries Ltd has announced that it will develop a large limestone mine in Yamaguchi Prefecture in anticipation of a further recovery in domestic demand for cement in Japan. The company will likely invest US$84m in what would be its first mine development in 35 years. Production is slated to kick off around 2017. Ube plans to operate the mine, which has estimated reserves of some 300Mt, for about 40 years.

Of the company's three domestic cement plants, two mainstay facilities in Yamaguchi have been procuring limestone from a mine near the new site. This existing mine, which produces 8Mt/yr of limestone, has been dug as deep as 140m and has been in production since 1948. High costs from deep mining prompted the company to look for a new site.

After sinking at one point to as low as 40Mt/yr, half of 1990 levels, Japanese cement demand has recently rebounded due to the reconstruction of areas devastated by the March 2011 Earthquake and Tsunami disaster. This trend will likely continue for a while, as efforts to repair and update ageing infrastructure are expected to pick up while reconstruction projects go on.

The Japan Cement Association estimates domestic demand in the current year (to March 2014) will grow by 3.4% year-on-year to 46Mt. Taiheiyo Cement Corporation and other cement makers are also gearing up to boost domestic supplies by curbing exports and taking other measures.