also: トゥー
noun
Common loanword for the number two, used in casual contexts, counting, or as part of compound terms.
ツーと言えばカーだ。
When someone says 'two,' the other immediately responds 'three' (like a well-coordinated pair).
ツーショットを撮ろう。
Let's take a two-shot (photo of two people).
The loanword for 'one,' often used in similar casual counting or paired expressions.
Borrowed from English 'two.'