The Stanford prison experiment was an investigation into the causes of difficulties between guards and criminals.
is a Japanese petroleum company .. It owns and operates oil platforms , refineries and produces and sells petroleum , oils and petrochemical products .. refineries. refinery. petrochemical. petrochemical. Idemitsu is the second largest petroleum refiner in Japan , after Nippon Oil .. Nippon Oil. Nippon Oil. It was ranked as the 262nd largest company in the world by revenue in Fortune Global 500 -LRB- 2008 -RRB- .. Fortune Global 500. Fortune Global 500. It is number 26 in petroleum refining .. Only publicly traded since 2006 , Idemitsu Kosan is not listed on the Nikkei 225 stock index or the Topix 100 , but instead in Topix Mid 400 .. Nikkei 225. Nikkei 225. Topix. Topix. The company is a member of the Mitsubishi UFJ Financial Group -LRB- MUFJ -RRB- keiretsu .. Mitsubishi UFJ Financial Group. Mitsubishi UFJ Financial Group. keiretsu. keiretsu