Japan's Nikkei edged lower in choppy trade on Wednesday as investors awaited key testimony on the U.S. economy from the Federal Reserve chief, while machinery shares fell on poor June orders.
The Nikkei share average shed 0.1% to 21,548.43, after flirting with positive territory.
Investors braced for remarks from Fed Chairman Jerome Powell during his two-day testimony before Congress, which starts on Wednesday. Also due on Wednesday is the central bank's June policy meeting minutes.
The broader Topix fell 0.5% to 1,566.56.
Source : Reuters