unusually

adverb [程度副词]特别地，极其，非常；异常地，不同寻常地

You can use unusually to suggest that something is not what normally happens.
异常地•  Unusually, for a Japanese politician, he's a fluent English speaker. 不同寻常的是，作为一位日本政府官员，他能讲流利的英语。