Japan’s top currency diplomat pledged Tuesday to continue taking necessary measures to stabilize the movements of the yen, underscoring his willingness to intervene in the foreign exchange market if necessary. As his predecessor, Masato Kanda, oversaw bouts of yen-buying operations to prevent the currency’s sharp fall in recent years, Atsushi Mimura said at a seminar in Tokyo that the government’s stance on market intervention has “never changed.” Mimura, vice finance minister for international affairs, took over the position from Kanda earlier this year. The yen has been on a downward trend d…