tiimu ha kinou syourisimasita.

A natural reading is:

• チーム → chiimu
• は → pronounced wa here
• 昨日 → usually kinō
• 勝利しました → shōri shimashita

So the whole sentence is pronounced roughly:

Chiimu wa kinō shōri shimashita.

A couple of pronunciation notes:

• チーム is a katakana word borrowed from English team.
• 勝利 has long vowels: shōri.
• しました is the polite past form of する.

This is one of the first things learners notice.

When は is used as the topic particle, it is pronounced wa, not ha.

So in this sentence:

• チームは = As for the team, ...

But when は is part of a word, it is normally pronounced ha.

This special pronunciation only happens in its particle use.

は marks the topic of the sentence.

So:

• チームは = As for the team, ...

This does not always mean exactly the same thing as the English subject. It sets up what the sentence is talking about.

In this sentence, the speaker is talking about the team, and then saying what happened concerning it:

• 昨日 勝利しました = won yesterday / achieved victory yesterday

So the basic structure is:

• Topic: チームは
• Comment about the topic: 昨日勝利しました

Because many common time expressions in Japanese can be used without a particle.

So 昨日 can simply mean:

• yesterday

and go directly before the verb:

• 昨日 勝利しました

This is very common.

You can sometimes see に with certain time words, but with words like:

• 昨日 = yesterday
• 今日 = today
• 明日 = tomorrow

you normally do not use に.

So:

• 昨日に勝利しました would sound unnatural.

Yes. Japanese word order is generally much more flexible than English, but the verb usually comes at the end.

That means a sentence like this often looks like:

• Topic + time + verb

So:

• チームは 昨日 勝利しました

This is normal Japanese structure.

English says:

• The team won yesterday.

Japanese tends to save the main verb until the end.

Also, 昨日 can sometimes move around if the meaning stays clear, for example:

• 昨日、チームは勝利しました。

That is also natural.

Grammatically, it is marked as the topic because it has は.

In beginner explanations, people often translate it like the subject in English, and that is usually good enough for understanding. But more precisely:

• が often marks the grammatical subject
• は marks the topic

Here, チーム is what the sentence is about.

So it is safest to think:

• チームは = As for the team

In many simple sentences, the topic and the English subject happen to line up, but they are not exactly the same concept.

勝利しました is made from:

• 勝利 = victory
• する = to do

Together, 勝利する means something like:

• to achieve victory
• to win

Then しました is the polite past form of する.

So:

• 勝利する = to win / to achieve victory
• 勝利しました = won / achieved victory

This is a very common pattern in Japanese:

• noun + する

For example, many Sino-Japanese nouns can become verbs this way.

Good question. Both can relate to winning, but the nuance is a little different.

• 勝ちました comes from 勝つ, a basic verb meaning to win
• 勝利しました is more formal and sounds a bit more like achieved victory

So 勝利しました can sound:

• more formal
• more written
• more news-like
• a little less conversational

In everyday speech, people often say things like:

• チームは昨日勝ちました。
• チームは昨日試合に勝ちました。

So the original sentence is not wrong, but it may sound more formal than what you would hear in casual conversation.

A simple way to think about it:

• 勝ちました = plain, common won
• 勝利しました = more formal achieved victory

Examples of where 勝利しました fits well:

• sports reports
• news articles
• formal announcements
• written summaries

Examples of where 勝ちました feels more natural:

• everyday conversation
• casual storytelling
• talking with friends

So if you are speaking casually, 勝ちました will often sound more natural.

Because -ました is the polite past ending.

Here is the breakdown:

• する = dictionary form
• します = polite non-past
• しました = polite past

So 勝利しました is polite and refers to a completed action in the past.

If you made it plain instead of polite, it would be:

• 勝利した

And the full plain sentence would be:

• チームは昨日勝利した。

That style is less polite and more casual or written, depending on context.

Yes, it is grammatically natural, but the tone is somewhat formal.

It sounds fine in contexts like:

• sports commentary
• a report
• formal narration
• written summaries

In everyday speech, many native speakers would more often say something like:

• チームは昨日勝ちました。
• チームは昨日試合に勝ちました。

So the original sentence is natural, but not the most casual wording.

Japanese normally does not use spaces between words.

So this sentence would usually be written as:

• チームは昨日勝利しました。

Spaces are often added in learning materials to help beginners see the parts more clearly.

That is why you may see:

• チーム　は　昨日　勝利しました。

in textbooks or exercises, even though normal Japanese writing would not separate them that way.

Japanese does not have articles like the or a.

So チーム can mean:

• the team
• a team
• sometimes just team, depending on context

The exact interpretation comes from the situation, previous conversation, or shared knowledge.

In this sentence, English usually translates it as the team, but Japanese itself does not explicitly mark that with an article.

By itself, チーム does not explicitly mark plural the way English often does.

Usually, context tells you whether it means:

• one team
• teams in general

In this sentence, it will normally be understood as one team, because of the context and the natural English translation the team.

Japanese often leaves number unmarked unless it needs to be made clear.