Petroleum News Alaska by Gary Park.  Japan’s largest importer of LNG has delivered a sharp jolt to the British Columbia government: Drop the idea of a tax on gas exports or put its LNG dreams in danger.  Tepco, Tokyo Electric Power Co., also prodded the government to resolve the concerns raised by First Nations about the construction of pipelines from northeastern British Columbia gas fields to coastal liquefaction terminals.  A company spokeswoman said uncertainty hanging over the LNG projects, including taxation on Greenfield operations, could slow or stop plans.  Tepco [...]