The U.S. government's plan to impose an additional 25 percent tariff on auto imports will have an 'extremely large impact' on the Japanese economy, Prime Minister Shigeru Ishiba warned Friday, as exports are a major driver of the Asian country's growth. Ishiba said during a parliamentary session, 'We will think about the most effective means to make the United States understand that this will not be of benefit to it,' while expressing readiness to continue negotiations with Washington. Bank of Japan policy board members also voiced concern about the negative impact of the tariffs on the nation's economy, a summary