Japan's Nikkei share average turns negative in choppy trade

TOKYO, Jan 21 (Reuters) - Japan's Nikkei share average edged down 0.1 percent into negative territory during mid-afternoon trading on Thursday, erasing the morning session's 1.9 percent gain.

The Topix subindex for financial shares slipped as much as 2.2 percent to lead the downturn as the yen strengthened slightly against the dollar.

(Reporting by Joshua Hunt; Editing by Chang-Ran Kim)