大事件 (daijiken) Japanese meaning: major incident | Kotomora。
That major incident became national news.
The politician's corruption developed into a big scandal.
Usage patterns
大事件が起きるfor a major incident to occur
A major incident occurred in that town.
大事件に発展するto escalate into a major incident
A small trouble escalated into a major incident.
〈事〉は大事件だsomething is treated as a huge deal
For him, being late is a huge deal.