expression
A direct borrowing of the English phrase, used as an enthusiastic call to action or encouragement. Common in casual, energetic contexts such as sports, events, or starting an activity.
みんな、準備はいい？レッツゴー！
Everyone ready? Let's go!
試合開始だ、レッツゴー！
The match is starting, let's go!
Variant with interpunct, sometimes used for clarity or emphasis.
Borrowed from English 'let's go', used as a set phrase in Japanese.