TOKYO, March 25 (Reuters) - Yields on 40-year Japanese government bonds fell after an auction of 40-year notes witnessed a solid demand, erasing concerns around low appetite for the debt. The 40-year JGB yield fell 0.5 basis point to 0.670%. Yields on other JGBs, however, rose. The 10-year JGB yield rose 1.5 basis points to 0.080%, while the 20-year JGB yield rose 1.5 basis points to 0.455%. The 30-year JGB yield rose one basis point to 0.630%. The two-year JGB yield rose one basis point to minus 0.135% and the five-year yield rose one basis point to minus 0.095%. Benchmark 10-year JGB futures fell 0.08 point to 151.34, with a trading volume of 14,442 lots.