shinjuusho o kakuninsuru.

I check the new address.

Breakdown of shinjuusho o kakuninsuru.

• を: direct object particle
• 確認かくにんする: to check
• 新住所しんじゅうしょ: a new address

Questions & Answers about shinjuusho o kakuninsuru.

How do you read 新住所を確認する?

It’s read:

しんじゅうしょ を かくにんする

Breakdown:

• 新住所 = しんじゅうしょ
• を = pronounced o
• 確認する = かくにんする

So the full reading is:

しんじゅうしょ を かくにんする

What does each part of the sentence do grammatically?

The structure is:

• 新住所 = new address
• を = marks the direct object
• 確認する = to confirm / to check

So grammatically, this is:

[object] を [verb]

In other words:

new address + object marker + confirm/check

Why is the particle を used here?

を marks the thing that the action is done to—the direct object.

Here, the action is 確認する (to confirm/check), and the thing being confirmed is 新住所 (new address).

So:

• 新住所を確認する = to confirm the new address

A native English speaker can think of を as roughly marking what is being acted on.