The lawyer defending the man who has confessed to Norway's bomb and shooting attacks said his client had presented a long list of "unrealistic" demands, including the resignation of the government and that his mental condition be investigated by Japanese specialists.

Geir Lippestad said Anders Behring Breivik had two lists of demands. One consisted of requests for items such as cigarettes and civilian clothing. The other was "unrealistic, far, far from the real world and shows he doesn't know how society works," Lippestad said.

He said Breivik linked this second list to his willingness to share information about two other alleged terrorist cells he has mentioned during questioning. "They are completely impossible to fulfil," Lippestad said. He added that, although Breivik had agreed to be examined by local psychiatrists, he also wanted to be investigated by Japanese specialists.

"He claims the Japanese understand the idea and values of honour and that a Japanese [specialist] would understand him a lot better than any European would."

Lippestad said his client had demanded complete political reform in which he wanted to be assigned a key role.

"His demands here include the complete overthrowing of both the Norwegian and European societies," he said, noting that it included the resignation of the Norwegian government. "But it shows that he doesn't understand the situation he's in."

Breivik claims he carried out the attacks as part of a network of modern-day crusaders to launch a revolution against a Europe spoiled by Muslim immigration, and that there are other cells ready to strike.

Investigators said they had found no signs of a larger conspiracy but they were searching his computer and mobile phone records for any signs of contact with other rightwing extremists who may have helped or influenced him.

The 22 July Oslo bombing killed eight people and the shooting massacre at an annual summer retreat held by the Labour party's youth wing claimed a 69 lives.

If Breivik is tried and convicted of terrorism, he could face up to 21 years in prison. An alternative custody arrangement, however, could keep him behind bars indefinitely.