An investigation to determine the cause of an accident or problem; tracing something back to its origin through systematic inquiry.
工場での火災について、原因究明が急務だ。
Determining the cause of the factory fire is an urgent task.
専門家チームが原因究明のために現地で調査を行っている。
A team of experts is conducting an on-site investigation to determine the cause.
原因究明が終わるまで製品の出荷を停止した。
Shipment of the product was halted until the cause was determined.