The operator of the Tokyo Stock Exchange on Thursday reported a technical problem blocking all trade, saying it was unable to predict when they could resume.
"Trading on all Tokyo Stock Exchange securities is suspended due to a problem affecting the transmission of market information
Japan Exchange Group said in a statement shortly before the scheduled opening at 2 a.m. ( Paris time).
A spokesperson told AFP that exchanges were suspended Thursday morning at 8:35 a.m. local time (1:35 a.m. in Paris on Wednesday).
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No further information was provided regarding the nature of the incident, as a result of which orders to buy and sell stocks of the country's two main indices, the Nikkei and the Topix, could not be processed.
The problem also affected trading on the Nagoya and Sapporo stock exchanges.
The Osaka Stock Exchange was operating normally, however, Japan Exchange Group said.
In August, several cyberattacks apparently from abroad disrupted the New Zealand Stock Exchange's computer networks by flooding them with traffic, forcing the place to freeze trading for four consecutive days.