A thorough investigation to uncover the true facts behind an incident or matter; commonly used in reporting or inquiries.
警察は事故の真相究明のため現場検証を行った。
The police conducted an on-site inspection to investigate the truth of the accident.
被害者の家族は真相究明を強く求めている。
The victim's family is strongly demanding a full inquiry into the truth.
社内調査で真相究明が進められている。
An internal investigation is underway to get to the bottom of the matter.