Nikkei down 0.7 pct as property firms drag

(Updates to late afternoon)

TOKYO, July 4 (Reuters) - The Nikkei share average fell 0.7 percent on Friday, on course to set its longest losing streak in more than half a century, dragged down by property stocks such as Sumitomo Realty & Development (8830.T: Quote, Profile, Research) on credit fears.

Shares of apartment developer Urban Corp (8868.T: Quote, Profile, Research) tumbled more than 30 percent, leading a sharp decline among some midsize property companies on speculation they could be risky investments following a handful of recent bankruptcies in the sector.

"The afternoon's market fall is due to property shares that are under huge pressure on credit worries. Investors think the real estate sector will have a tough time going forward," said Hiroaki Kuramochi, general manager of the financial institutions service department at Tokai Tokyo Securities.

As of 0532 GMT, the benchmark Nikkei .N225 fell 85.80 points to 13,179.60, heading for its longest losing streak since a 15-day period in 1954.

The broader Topix shed 0.5 percent to 1,292.22.

Shares of Sumitomo Realty & Development dropped 3.5 percent to 2,065 yen and Mitsubishi Estate Co Ltd (8802.T: Quote, Profile, Research) fell 2.1 percent to 2,355 yen.

Urban tumbled 30.4 percent to 183 yen.

"I don't know what kind of information people are basing their sell-off on, but at this point, a lot of people are selling on worries about credit risks," said Credit Suisse analyst Masahiro Mochizuki, referring to Urban's shares.