TOKYO, Aug 3 (Reuters) - Japanese government bond prices fell on Monday due to a return of risk appetite and the yen's pullback, curbing demand for safe-haven debt.

Benchmark 10-year JGB futures lost 0.20 point to 152.17, a level unseen since July 15, with a trading volume of 15,181 lots.

In the cash bond market, the 10-year JGB yield gained 1.5 basis points to 0.025%.

In the middle end of the yield curve, the five-year yield added 1.5 basis points to minus 0.115%.

In the super-long zone, the 20-year JGB yield rose 2 basis points to 0.400%, while the 40-year JGB yield rose 2.5 basis points to 0.570%.

The 30-year JGB yield and the two-year JGB yield were untraded.

Investors also adjusted their positions ahead of the 10-year debt sale on Tuesday.

The Nikkei stock average rose above 2% to snap six straight days of losses as market sentiment was lifted by a softer yen and Wall Street's gain on upbeat earnings.

In the currency market, the dollar steadied on the yen at 105.89 yen, moving away from a 4-1/2 low marked last week. (Reporting by the Tokyo Markets Team; Editing by Rashmi Aich)