densya no zyouhou wo kakuninsimasita.

It is read:

でんしゃ の じょうほう を かくにんしました
densha no jouhou o kakunin shimashita

A natural English gloss is I checked the train information or I confirmed the train information.

の links two nouns together.

In this sentence:

• 電車 = train
• 情報 = information
• 電車の情報 = train information / information about the train(s)

So の is showing a relationship between the two nouns. In English, this is often translated as of, about, or sometimes just by putting one noun before the other.

を marks the direct object of the verb — in other words, the thing that was checked.

So here:

• 電車の情報 = the train information
• を確認しました = checked/confirmed it

Putting it together:

• 電車の情報を確認しました = checked the train information

確認しました is the polite past form of 確認する.

• 確認する = to confirm, to check, to make sure
• 確認しました = confirmed / checked

This verb often implies checking something carefully to make sure it is correct or to verify it.

So compared with some other verbs:

• 見ました = looked at / saw
• 調べました = investigated / looked up
• 確認しました = checked/confirmed

If you just glanced at train info, 見ました might work.
If you looked it up in detail, 調べました might work.
If you checked it to make sure of the details, 確認しました is very natural.

Because the sentence is describing an action that has already been completed.

• 確認します = will check / check
• 確認しました = checked / did check

Japanese often uses the past tense when reporting that something has been done.

So 電車の情報を確認しました means that the checking has already happened.

Japanese very often leaves out the subject when it is clear from context.

So even though the sentence does not say 私は, the meaning is often understood as:

• I checked the train information
• or sometimes We checked the train information

The exact subject depends on the situation. This is completely normal in Japanese.

In this sentence, it normally means information about the train or train-related information.

For example, it could mean:

• departure time
• delay information
• platform information
• route information

The particle の can show different kinds of relationships, but here the most natural interpretation is information about trains.

Yes. It is in the polite form because of しました.

• plain form: 電車の情報を確認した
• polite form: 電車の情報を確認しました

The polite version is appropriate in many everyday situations, especially when speaking to someone you do not know well, to a teacher, a coworker, or in customer-service-style language.

Yes. Normal Japanese writing would usually be:

電車の情報を確認しました。

The spaces are often added only for learners to make the sentence easier to read.

Sometimes, depending on context, but not literally.

情報 means information, which is broader than schedule. It could include:

• timetable
• delay notices
• platform changes
• service updates

If you specifically mean schedule or timetable, Japanese would more directly use words like:

• 時刻表 = timetable
• スケジュール = schedule

So 電車の情報を確認しました is broader than just I checked the train schedule.

Because 確認しました sounds more purposeful.

Compare them:

• 見ました = I looked at it
• 確認しました = I checked it / verified it

If you want to say you looked at the train info to make sure of something, 確認しました is better.

For example:

• 電車の情報を見ました = I looked at the train information
• 電車の情報を確認しました = I checked the train information

The second one suggests more intention and certainty.