zizitu wo kakuninsimasita.

It is read:

じじつ を かくにんしました
jijitsu o kakunin shimashita

A few notes:

• 事実 = じじつ
• を is the object particle. It is written を but in modern Japanese it is pronounced お / o
• 確認しました = かくにんしました

So the whole sentence is jijitsu o kakunin shimashita.

を marks the direct object of the verb.

In this sentence:

• 事実 = the fact / the facts
• を = marks 事実 as the thing being acted on
• 確認しました = confirmed

So 事実を確認しました literally means something like:

[I/we/etc.] confirmed the facts

English uses word order a lot to show this relationship, but Japanese often uses particles like を.

確認しました is the polite past form.

Compare:

• 確認した = confirmed / did confirm
  
  • plain style
• 確認しました = confirmed
  
  • polite style

Japanese often switches between plain and polite styles depending on the situation.

So 確認しました would be natural in:

• work situations
• formal writing
• speaking politely
• reports or announcements

That is because 確認 is a verbal noun, often called a suru noun.

This means:

• 確認 by itself means confirmation / checking
• 確認する means to confirm / to check
• 確認しました is the polite past of 確認する

So the structure is:

• 確認する = to confirm
• 確認しました = confirmed

This pattern is very common in Japanese. Other examples:

• 勉強する = to study
• 電話する = to call
• 確認する = to confirm

Japanese often leaves out the subject when it is clear from context or not important.

So 事実を確認しました could mean:

• I confirmed the facts
• We confirmed the facts
• He/She confirmed the facts
• They confirmed the facts

The actual subject depends on the situation.

This is very normal in Japanese. If the speaker does not need to say who did it, they often just omit it.

Because しました is the past form of します.

Compare:

• 確認します = confirm / will confirm
• 確認しました = confirmed

So this sentence describes an action that has already been completed.

Depending on context, it can sound like:

• I confirmed the facts
• We have confirmed the facts

Japanese past tense often covers both a simple past idea and a completed-action idea.

They are related, but not the same.

• 事実 = fact, an objective fact or actual state of affairs
• 本当 = true, really, genuine, or sometimes the truth depending on context

In this sentence, 事実 sounds more formal and objective. It fits well with 確認する, especially in business, official, or serious contexts.

So 事実を確認しました feels like:

• checking the facts
• confirming what is factually true
• verifying factual information

That is more formal than many everyday uses of 本当.

Yes, usually 確認しました sounds more formal and professional.

Compare:

• 確認しました

  • formal
  • common in business, reports, official settings
  • often used for verifying or confirming information

• 確かめました

  • more general and everyday
  • can mean checked, made sure, verified

For example:

• 事実を確認しました sounds like something in a report, meeting, or investigation.
• ちゃんと確かめました sounds more conversational: I checked carefully / I made sure.

Both can be translated as confirmed or checked, but the tone is different.

Japanese usually puts the verb at the end of the sentence.

So the basic pattern is often:

object + を + verb

Here:

• 事実 = object
• を = object marker
• 確認しました = verb

That is why the sentence ends with the action.

This verb-final pattern is one of the most important differences from English word order.

In modern standard Japanese, the particle を is pronounced お, which is usually written in romanization as o.

So:

• written: を
• pronounced: お / o

Some learning materials write it as wo to remind you of the kana, but in normal pronunciation it is basically just o.

So this sentence is pronounced:

じじつ お かくにんしました
but romanized normally as
jijitsu o kakunin shimashita

Yes, depending on context, that can be a natural translation.

確認する can mean:

• confirm
• check
• verify

So possible translations include:

• I confirmed the facts.
• I checked the facts.
• We verified the facts.

Which one is best depends on the situation:

• If it is about making sure information is correct, verified or confirmed may fit best.
• If it is more general, checked may sound more natural in English.

No, normal Japanese writing usually does not use spaces between words.

Normally this would be written as:

事実を確認しました。

Spaces are often added in teaching materials to help beginners see the parts more clearly:

• 事実
• を
• 確認しました

So the spaced version is just a learning aid, not standard Japanese formatting.