The national government retains the capacity to support the local currency despite speculation that capital shortages hinder its operations, Mimura said. Japan's top currency diplomat stated on September 28 that he has "absolutely no such concern" regarding market views that funding constraints might limit the ability of the state to conduct yen-buying interventions.

Mimura urged market participants to heed a "very clear" warning on the yen, noting that the government remains neither satisfied nor reassured by recent currency movements. The remarks, first reported by Reuters, signal that Tokyo is prepared to act against excessive volatility in the foreign exchange market.