This is the 3326th most frequent Japanese word.
捜査
Investigation.
Here, '捜査' (sousa) refers to the process of investigation, particularly in a legal or criminal context.
警察は犯罪の捜査をしています。
The police are investigating the crime.
In this sentence, '捜査' is being used to refer to an ongoing investigation, implying advancements in uncovering facts or details.
捜査が進展しています。
The investigation is making progress.
Here, '捜査' emphasizes the thoroughness or depth of the investigative efforts concerning the matter at hand.