Japan's Finance Minister Taro Aso has told CNBC he was satisfied that the Group of 20 (G-20) nations "understood" that his country was not trying to artificially manipulate its currency.

In an exclusive interview with CNBC on the sidelines of the G-20 meeting of finance ministers and central bankers in Moscow, Aso said the communique released seemed to validate Japan's motives for its recent economic policies, but added that this does not represent an endorsement.