Japan's Hitachi Company is one among the victims of massive cyberattack that has been perpetrated with the use of virus WanaCrypt0r 2.0 that infected computers around the globe this weekend.
The cyberattack has made it impossible for the employees to work with email. Measures are currently being taken to fix the system, the NHK said.
As of Monday, more than 2,000 cases of malware infection by a ransomware program were recorded in Japan since Saturday, an organization specializing on information security issues said.
The computers belonging to some 600 companies and individuals were affected by the cyberattack, Japan Computer Emergency Response Team Coordination Center (JPСERT/CC) officials were quoted as saying Monday.
The virus also hit mail servers of Hitachi multinational conglomerate company and JR East Japan railway company.
Last Friday, the Kaspersky Lab IT company registered about 45,000 ransomware attacks in 74 countries worldwide, with the largest number of targets in Russia.
The company reported that the attack was carried out with the use of ransomware dubbed WannaCry. The malicious software has reportedly infected computers in up to a hundred countries and tried to extort users' money.
The global cyberattack may continue on Monday and the attack affected 200,000 users in 150 countries, including businesses and large corporations, Europol Executive Director Rob Wainwright said Sunday.