Nippon Steel Corp., the Japanese company embroiled in lengthy battle to buy US Steel Corp., said it plans to spend 869 billion yen ($6 billion) at home to expand output from cleaner furnaces.

Nippon Steel plans to invest $14 billion in U.S. Steel's operations including up to $4 billion in a new steel mill if the Trump administration green lights its bid for the iconic U.S. company, according to a document and three people familiar with the matter.

If the US gets a 'golden share' of Nippon Steel's takeover of US Steel, it would be the latest example of how Washington, D.C. increasingly has a say in the operations of major companies.

Nippon Steel Corp. plans to invest $14 billion in United States Steel Corp. if the Trump administration approves the merger of the companies, Reuters reported.Details of the plan include Nippon Steel investing $4 billion in a new steel mill,

President Donald Trump travels to Pittsburgh Friday to celebrate a deal he once vowed to oppose - Japanese steelmaker Nippon Steel’s long-announced plans to buy iconic American steelmaker US Steel.

The Japanese steelmaker said the investment in electric arc furnaces will increase production capacity while significantly reducing emissions.

Nippon Steel (OTCPK:NPSCY) (OTCPK:NISTF), the Japanese firm locked in a prolonged battle to acquire U.S. Steel (X), announced plans on Friday to invest 869 billion yen ($6 billion) domestically to boost production using cleaner furnace technology.

Gary Mayor Eddie Melton said Nippon Steel​ plans to pump $1 billion in the Gary Works U.S. Steel facility — the largest steel plant in the country.