noun
court of inquiry; board of inquiry
A formal committee or panel that investigates facts, often in legal, governmental, or corporate contexts.
事故の原因を調べるため、査問委員会が設置された。
A court of inquiry was established to investigate the cause of the accident.
調査委員会 is a more general 'investigation committee', while 査問委員会 implies a formal inquiry with authority to question witnesses.
Compound of 査問 (inquiry, investigation) and 委員会 (committee).