Japanese stocks fell marginally on Friday after information about OpenAI's estimated revenues eased investor concerns related to technology investments and reports that the Japanese technology investor, SoftBank Group, is in talks with Gulf investors to raise $100 billion to expand its artificial intelligence investments.

The benchmark Nikkei 225 closed down 11.19 points, or 0.02%, at 69,030.92.

Oil prices fell on hope of progress in US-Iran backchannel talks after President Donald Trump said US attacks on Iran would remain on hold till the November midterm elections, easing concerns over energy supply disruptions in the Middle East.

On the corporate side, Kansai Electric Power (TYO:9503) will resume commissioning at Mihama Nuclear Power Station Unit 3 on Saturday, according to a Friday Tokyo bourse filing.

Also, As One's (TYO:7476) net sales grew 4.2% year over year to 8.80 billion yen in September, according to a Friday filing on the Tokyo Stock Exchange.