chizu de kyori o kakuninshita.

direct object particle

Breakdown of chizu de kyori o kakuninshita.

• で: location particle
• 地図ちず: map
• 確認かくにんする: to check

Questions & Answers about chizu de kyori o kakuninshita.

Why is で used after 地図?

Here, で marks the means/tool used to do something.

So 地図で means:

• using a map
• by means of a map

In this sentence, the speaker checked the distance with a map.

This is a very common use of で:

• 電車で行く = go by train
• 箸で食べる = eat with chopsticks
• スマホで調べる = look it up on/with a smartphone

So 地図で距離を確認した is literally something like:

• checked the distance using a map

Why is 距離 marked with を?

を marks the direct object of the verb.

The verb here is 確認した (confirmed / checked), and the thing being checked is 距離 (distance).

So:

• 距離を確認した = checked the distance

This is the normal pattern:

• 何を確認する = confirm/check what?

Examples:

• 予定を確認した = checked the schedule
• 時間を確認した = checked the time
• 住所を確認した = checked the address