Japanese Christianity has "spinelessly gone along with the government," shunning social activism and being "excessively theoretical," says a leading theologian.

Japan's churches bodies have been urged to form a consortium to respond to the devastating earthquake, tsunami and nuclear power plant accident.

A 'cross of comfort' has been erected at a church site about one month after its building was washed away by the tsunami that devastated Japan.

Churches are among those who keep searching for missing people, including clergy, members and their families, as the quake death toll rises.