Sharp down of crude oil price by influence of OPEC decision, its affect Shale oil & gas development, existing crude oil discovery & production business, change of World energy trends and impact for Japanese Industries. Moreover in petrochemical industries in Japan,competitiveness of naphtha based petrochemical products are week against ethane based petrochemical product (from middle east & North America produced ethylene and propylene etc.). Strategy in Japanese Chemical industries must be changed near future.