TOKYO (AP) — The leader of an investigation panel of Japan’s nuclear disaster is vowing it will cut deeper into the case than its government-appointed counterpart.

Panel chairman Kiyoshi Kurokawa said Monday he wants to provide socially and globally significant insights. The 10-member team was appointed by Parliament and is bipartisan.

Its investigators are the first with the power to subpeona witnesses.

The government’s own investigation said in preliminary findings last month that Japan’s nuclear crisis management was marred by erroneous assumptions about equipment, delayed disclosure of radiation leaks and other problems.

The Fukushima nuclear power plant that was damaged by last March’s earthquake and tsunami has been declared stable.