TOKYO, Sept 20 (Reuters) - Japanese Finance Minister TaroAso said on Friday that monetary policy was up to the Bank ofJapan to decide, when asked about the possibility of the centralbank's deepening negative interest rates.
The central bank kept monetary policy steady on Thursday butsignalled the chance of expanding stimulus as early as its nextpolicy meeting in October by issuing a stronger warning againstoverseas risks threatening the export-reliant economy.(Reporting by Tetsushi KajimotoEditing by Chang-Ran Kim)