TOKYO, Aug 12 (Reuters) - Japan's Nikkei share average fell to two-week lows on Wednesday after the Chinese central bank lowered the yuan for a second day, fanning more worries of slowing growth in China and hitting China-related shares.
The Nikkei average fell 1.6 percent to 20,392.77 hitting its lowest level in two weeks and logging its biggest fall in more than a month.
The broader Topix fell 1.3 percent to 1,665.75 in heavy trading volume, with turnover reaching more than 3 trillion yen, about 25 percent above the average in the past year.
Steelmakers led big losses among China-related shares while exporters were hit and inbound tourism-related shares also slumped.
Reporting by Hideyuki Sano; Editing by Jacqueline Wong