(EnergyAsia, December 1 2011, Thursday) — Idemitsu Kosan Co, Japan’s third-largest oil company, could lose nearly a fifth of its 640,000 b/d refining capacity by March 2014 if it chooses not to comply with new government regulations to upgrade ageing plants.The company said it plans to shut down its 120,000 b/d Tokuyama refinery in western…