The death toll has risen to 92, with the number of people unaccounted for exceeding 200 in Ishikawa four days after a series of earthquakes struck the central Japanese prefecture and its vicinity, raising concerns of escalating damage, reported Xinhua.

As of 9am local time on Friday, a total of 242 people were reported missing in Ishikawa, national news agency Kyodo reported.

In the aftermath of the earthquake, the most-hit coastal city of...