Tokyo, September 4 (BridgeNews) - Japan's trade surplus in the August 1-20 period stood at 129.0 billion yen ($1.08 billion), down 71.8% on year, the Ministry of Finance announced. The data showed no change in the slowing in overseas demand. The surplus for August 1-31 was expected to continue to show a drop on year, resulting in falls for 14 straight months.