ウォッチャー

noun

watcher; observer

Loanword from English, used in Japanese to refer to someone who watches or observes something, often in a specific context (e.g., market watcher, trend watcher).

• 彼かれは業ぎょう界かいの動どう向こうを追おうウォッチャーとして知しられている。

  He is known as a watcher who follows industry trends.