The failure of U.S. energy company Enron Corp. threatens to end four thermal power generation projects that the Houston-based firm was pushing in Japan, industry officials said Monday.

In Aomori Prefecture, where Enron had planned to build a thermal electricity plant powered by liquefied natural gas in the village of Rokkasho, a senior prefectural official said, "We have not given up hope, but the outlook has become gloomier."

As of Monday, Enron had yet to decide the future of its operations in Japan, according to its Japanese unit.