昨日きのうや今日きょう

expression, noun

only recently; just the other day

Emphasizes that something happened very recently, often with a sense of surprise or immediacy. Similar to 昨日今日, but the や adds a slightly more colloquial or emphatic feel.

See also: 昨日今日

• 昨日きのうや今日きょう始はじめたばかりなのに、もうこんなに上じょう達たつしたの？

  You only started just recently, and you've already improved this much?

• その話はなしは昨日きのうや今日きょうのことではない。ずっと前まえから知しっていた。

  That's not something I heard only recently. I've known about it for a long time.