Japan and US step up coordinated push to stem yen’s slide
String of interventions launched with Japanese currency near historic lows The yen surged in waves on Friday, strengthening to a level not seen since mid-May. (Photo by Masayuki Terazawa) TOKYO -- Japanese and U.S. authorities are working closely to stem the yen's weakness against the dollar, carrying out a series of interventions and signaling their coordinated effort to the market.