Infiltration into the Big Brother system was also made in Achi through a LAN connection with the government office buildings, allowing them to control communication servers.
Nagano Prefectural officials said attempts to infiltrate the firewall had not been made because it would break illegal access laws.
The Nagano Prefectural Government has been trying to hack into the Big Brother system in an apparent bid to use the results as the basis for justifying its withdrawal from the network.