TOKYO, July 22 (Reuters) - Japanese government bond (JGB)

yields rose on Wednesday as inflation concerns mounted ahead of

a sale of the nation's longest-dated debt.

Here are a few details:

* The benchmark 10-year JGB yield climbed 2.5

basis points to 2.745%. The five-year yield rose 2

bps to 1.960%. Yields move inversely to bond prices.

* JGB yields tracked a global move higher after U.S.

Treasury yields hit a two-month peak and euro zone yields edged

up, as escalating U.S.-Iran tensions lifted oil prices and

revived inflation and rate-hike worries in major bond markets.

* The Ministry of Finance is due to sell about 300 billion

yen in 40-year JGBs on Wednesday. The yield on the bond

, Japan's longest tenor, was unchanged at 3.89%.

It had reached a record high of 4.355% in May.

* "The 40-year yield is accordingly now lower than at the

time of the May auction, but remains very much on the high side

by longer-term standards and is thus likely to have at least

some appeal to the market participants focused on absolute

income," Mizuho Securities market analyst Yuhi Kawano said in a

note.

* Market participants remained focused on the Bank of

Japan's next policy meeting, with expectations firming for the

central bank to keep rates on hold next week but potentially

signal a faster pace of tightening as inflation risks persist.

* The two-year yield, the one most sensitive

to BOJ policy rates, held steady at 1.435%.

(Reporting by Rocky Swift in Tokyo; Editing by Subhranshu Sahu)