Complex sentence: Kansai Electric Power Company, and Japan Atomic Energy Agency, because the Mihama Nuclear Power Plant and the Monju fast-breeder reactor could also be affected by a possible earthquake caused by the Urazoko fault.
Split into simpler sentences: Kansai Electric Power Company, and Japan Atomic Energy Agency. Because the Mihama Nuclear Power Plant and the Monju fast-breeder reactor could be affected too by a possible earthquake caused by the Urazoko fault.