off the bat

Prepositional phrase

US idiomatic

(US, idiomatic) From the start; immediately; right away.

Japanese Meaning

初めから / すぐに / 直ちに / 即座に

Off the bat, she made it clear she wouldn't accept any late submissions.

最初から、彼女は遅れて提出されたものは一切受け付けないと明言した。

Sense（1）

(US, idiomatic) From the start; immediately; right away.

Right off the bat, I can see that you need to see a doctor.