TOKYO, Oct 23 (Reuters) - Yields on Japan's longer-dated

government bonds edged up on Wednesday amid concerns about the

country's fiscal expansion and political uncertainties ahead of

the election.

The 20-year JGB yield rose 1 basis point (bp)

to 1.785% and the 30-year JGB yield rose 1 bp to

2.215%.

Japan's Prime Minister Shigeru Ishiba said in an election

campaign speech that the government would aim for a spending

package funded by a supplementary budget that exceeds last

year's 13 trillion yen ($87 billion).

"This means the government may not be able to achieve a

primary balance surplus next fiscal year," said Katsutoshi

Inadome, senior strategist at Sumitomo Mitsui Trust Asset

Management.

"And if the current coalition loses its majority at the

upcoming election, it may have to invite other, such as the

National Democratic Party, which supports tax cuts, for the

majority."

Japan's local media reported that the ruling Liberal

Democratic Party (LDP) and its coalition partner Komeito may

lose their majority in the lower house in the Oct. 27 election.

The 40-year JGB yield rose 1 bp to 2.525%.

The 10-year JGB yield rose 0.5 bp to 0.98%.

The two-year JGBs were not traded and the yield

was unchanged at 0.45%.

The five-year yield was flat at 0.595%.

($1 = 152.1800 yen)