TOKYO: US President Donald Trump raised concern about yen weakness during a summit with Japanese Prime Minister Sanae Takaichi, Japan’s Finance Minister Satsuki Katayama said, offering an unusually detailed account of the leaders’ talks on currencies.”At the recent Japan-US summit meeting, President Trump expressed concern about the yen’s weakness,” Katayama said at a regular news conference, adding that she was disclosing the exchange for the first time after consulting with the Prime Minister’s Office.”Prime Minister Takaichi told him, as a general principle, that an undervalued yen is problematic,” Katayama said.Katayama’s unusually frank account of leaders’ talks, which governments typically keep…