Brunei National Petroleum Co. has signed a deal with two major Japanese companies to form a methanol transport firm to support the first petrochemical plant in the oil rich kingdom, according to reports Saturday from Brunei. The Japanese companies, Kokuka Sangyo, which is a subsidiary of Mitsubishi Gas Chemical Co., and trading giant Itochu Corp. signed the agreement Friday with PB Logistics, a subsidiary of Brunei National Petroleum in Brunei.