Signs of Hitachi subsidiary Horizon Nuclear Power adorn fencing surrounding the location of the new Wylfa Newydd reactor at Anglesey on January 17, 2019 in Bangor, Wales. (Getty/Kyodo)

TOKYO - Hitachi Ltd. said Wednesday it will exit a 3 trillion yen ($28 billion) project to build a nuclear power plant in Britain after struggling to secure additional financial support from the British government.