TOKYO, July 9 (Reuters) - Japan's super-long government

bonds were little changed on Wednesday as investors refrained

from active trade ahead of a carefully watched 20-year bond

auction in the next session.

The 20-year JGB yield fell 0.5 basis point

(bp) to 2.495%.

The 30-year JGB yield fell 1 basis point to

3.050%.

Yields move inversely to bond prices.

"The market was cautiously awaiting the 20-year bond auction

and tried not to make active bets," said Gen Taniguchi, market

analyst at Mizuho Securities.

The 20- and 30-year JGB yields rose sharply this week amid

expectations that the Liberal Democratic Party and junior

partner Komeito, which form the ruling coalition, could risk

losing their majority in the July 20 upper house election.

The potential defeat of the coalition could give power to

opposition parties who have pledged in their campaign platforms

to cut or abolish the sales tax.

The Ministry of Finance this month trimmed issuance of those

bonds in response to record-high yields on those bonds scaled in

May.

But the market now weighs the election outcome that could

lead to the fiscal expansion more than the reduction in bond

issuance, Taniguchi said.

Last week's auction of 30-year bonds, the ministry's first

auction of super-long debt under a reduced-issuance scheme, saw

a weak demand.

The 10-year JGB yield rose 1 bp to 1.495%.

The five-year yield rose 1.5 bps to 1.02%.

The two-year JGB yield rose 1.5 bps to 0.745%.

The 40-year JGB yield fell 1.5 bps to 3.35%.