Nikkei dips as banks hit again, exporters down

(Updates to midmorning)

TOKYO, Sept 25 (Reuters) - Japan's Nikkei average dipped 0.3 percent on Tuesday, dragged lower by financial shares such as Mizuho Financial Group Inc after credit worries hit Wall Street again overnight, while a stronger yen weighed on exporters.

Separately, shares of Advantest Corp dropped nearly 6 percent after the Nikkei business daily reported on Saturday that Japan's top maker of semiconductor testing equipment will likely miss its annual ...