TOKYO, Sept 30 (Reuters) - Yields on Japanese government bonds were little changed on Wednesday after neither candidate in a U.S. presidential debate emerged with a clear advantage in what is expected to a close election. Republican President Donald Trump and Democratic rival Joe Biden battled fiercely over Trump’s leadership on the coronavirus pandemic, the economy and the integrity of the upcoming election. Yields also held steady as traders avoided taking big positions before an auction of 10-year debt on Thursday. Benchmark 10-year JGB futures fell 0.01 point to 152.1, with a trading volume of 12,797 lots. The 10-year JGB yield was flat at 0.015%, while the 20-year JGB yield was flat at 0.400%. The 30-year JGB yield fell 1 basis point to 0.595%. At the middle of the yield curve, the five-year yield was flat at minus 0.115%. At the short end, the two-year JGB yield was flat at minus 0.145%. (Reporting by the Tokyo markets team; Editing by Vinay Dwivedi)