Researcher Sugiura: high oil prices hurt producers and consumers 
High oil prices pose a threat to producer countries and for the countries-consumers of raw materials, damaging their national interests, Toshihiro Sugiura, a specialist at the Institute for Economic Research of North Asia (ERINA) in Japan in the field of oil and gas, told RIA Novosti.
a minus for the global, Japanese and Russian economies, ”the expert explained. The specialist finds the optimal price in the region of $ 60 per barrel.