TOKYO, Aug 15 (Reuters) - Japanese government bond

yields rose on Thursday amid a weak outcome for the Bank of

Japan's regular bond buying and as data indicating a strong

economic rebound revived rate hike worries.

The 10-year JGB yield rose 2.5 basis points

(bps) to 0.830%.

The BOJ conducted its regular purchases of bonds with

maturities from one year to 25 years and longer. There were more

selling of bonds with maturities between 5 to 10 years,

strategists said.

Japan's economy expanded by a much faster-than-expected

annualised 3.1% in the second quarter, rebounding from a slump

at the start of the year thanks to a strong rise in consumption.

"The strong consumption convinced the market to think the

BOJ's rate hike scenario might be still valid," said Takahiro

Ootsuka, senior fixed income strategist at Mitsubishi UFJ Morgan

Stanley Securities.

The expectations for the BOJ's policy tightening had receded

after the market rout last week when the benchmark Nikkei 225

marked its biggest single-day decline in nearly 40

years.

The two-year JGB yield rose 3 bps to 0.32%.

The two-year OIS was 0.39%, while the rate on

the forward two-year OIS from August 2025 was

0.4529%.

The forward two-year OIS rose to as high as 0.6597% on Aug.

1, the day after the BOJ unexpectedly raised its policy rate to

0.25%.

The 20-year JGB yield rose 1.5 bps to 1.65%.

The 30-year JGB yield was flat at 2.02%.

The 40-year JGB yield was flat at 2.255%.