CurrenciesBOJ data suggests additional $13bn yen intervention on Friday
Possible back-to-back moves late last week intended to stop yen slide
Investors are paying close attention to the Bank of Japan's next move with a monetary policy meeting scheduled for July 30 and 31. (Photo by Mizuho Miyazaki)
MITSURU OBE, Nikkei Asia chief business news correspondent
TOKYO -- The Bank of Japan is seen to have stepped into the currency market on two consecutive trading days last Thursday and Friday, data showed on Tuesday, in moves that demonstrate heightened concern among Japan's currency authorities over the yen's sustained depreciation.