TREASURIES-Edge down in Asia ahead of 7-yr debt sale

TOKYO, July 30 (Reuters) - U.S. Treasuries edged lower in Asia on Thursday as investors stayed cautious ahead of a seven-year debt sale, after a second poor auction this week heightened supply concerns.

* The weak bidding for a record $39 billion five-year note sale on Wednesday followed a meagre investor showing at Tuesday's $42 billion two-year debt sale. The disappointing results raised worries about the prospects for a record $28 billion seven-year note auction on Thursday.

* "Weak demand for U.S. government debt so far this week revived concerns over investor appetite, especially that of foreign investors," said a strategist for Japanese securities firm. But he also said the poor auction results did not drag down the overall market significantly since investors have priced in the possibility of waning appetite from outside the U.S. to some extent.

* The benchmark 10-year notes dipped 4/32 in price to yield 3.684 percent US10YT=RR, up 2 basis points from late New York trade on Wednesday.

* The two-year notes US2YT=RR were steady in price to yield 1.183 percent. The yield on the new five-year Treasury notes auctioned on Wednesday stood at 2.684 percent US5YT=RR.

* The 30-year bonds fall 8/32 in price to yield 4.524 percent US30YT=RR, up 2 basis points.

* Asian shares largely stayed in ranges with Tokyo's Nikkei stocks average .N225 little changed and MSCI's broad measure of Asian stocks outside Japan slipping 0.3 percent .MIAPJ0000PUS. Shanghai shares .SSEC see-sawed after a 5 percent sell-off the previous day.

* The U.S. will release first-time claims for jobless benefits for the week ended July 25 at 1230 GMT. Economists in a Reuters survey forecast a total of 570,000 new filings compared with 554,000 in the prior week. [USJOB=ECI] (Reporting by Kaori Kaneko; Editing by Chris Gallagher)