sokukounyuu ga dekimasu.

Immediate purchase is possible.

Breakdown of sokukounyuu ga dekimasu.

• が: subject particle
• できる: to be able to do
• 即購入そくこうにゅう: immediate purchase without prior comment

Questions & Answers about sokukounyuu ga dekimasu.

How do you read 即購入?

It’s usually read そくこうにゅう.

• 即 = immediate / instant
• 購入 = purchase / buying

So 即購入 literally means something like immediate purchase or instant buying.

In online selling contexts, it often means buying right away without asking first.

Why is が used here instead of を?

This is a very common learner question.

In 即購入ができます, the verb is できます.
With できる, the thing that is possible is often marked with が.

So the structure is:

• 即購入 = immediate purchase
• が = marks the thing that is possible
• できます = is possible / can be done

That is why が sounds natural here.

Compare:

• 購入をする = to make a purchase
• 購入ができる = to be able to make a purchase

English learners often expect を because purchase feels like an object, but with できる, Japanese commonly switches to が.

Is できます the same as the potential form of する?