sore ha ruuru ihan desu.

This is one of the first things learners notice in Japanese.

The particle is written with the hiragana は, but when it is used as the topic particle, it is pronounced wa.

So:

• それは = sore wa
• not sore ha

This is a special reading used only for the particle. The same character は is normally pronounced ha in regular words.

Yes, それ usually means that, but more specifically it refers to something near the listener or something that was just mentioned.

Japanese has a three-way system:

• これ = this
• それ = that (near you / the thing you mentioned)
• あれ = that over there

So それはルール違反です means something like:

• That is a rule violation
• That is against the rules

Depending on context, それ could point to an action, a statement, an object, or a situation.

は marks the topic of the sentence.

So in:

• それ は ルール違反 です

the topic is それ (as for that...), and the rest of the sentence says something about it:

• ...it is a rule violation

A very literal breakdown would be:

• As for that, it is a rule violation.

This is why Japanese sentences often feel different from English. Japanese often starts by setting the topic, then comments on it.

Japanese does not normally use articles like English a, an, and the.

So ルール違反です can mean:

• is a rule violation
• is the rule violation
• is rule-breaking
• is against the rules

The exact interpretation depends on context.

This is very normal in Japanese. You often have to get that kind of information from the situation rather than from a separate word.

ルール違反 is a noun phrase made of two nouns:

• ルール = rule
• 違反 = violation, breach

Together, they mean:

• rule violation
• breaking the rules
• against the rules

In Japanese, it is very common to put nouns together like this without any extra word in between.

So this is not unusual at all. It works much like English compounds such as:

• school rule
• traffic violation
• safety check

Because ルール違反 is a compound expression: rule + violation.

Japanese often combines nouns directly to create a single concept. Here, ルール modifies 違反, so the whole phrase means violation of the rules.

You do not need a particle here.

Compare:

• ルール違反 = a rule violation
• 交通違反 = a traffic violation

If you switch to a verbal expression instead, the grammar changes. For example:

• ルールに違反する = to violate the rules

There, に is used with 違反する.

です is the polite copula, roughly like is / am / are in English.

So:

• ルール違反です = is a rule violation

It also makes the sentence polite or neutral-polite.

Without です, the sentence would sound incomplete in standard polite speech.

Some less formal versions are:

• それはルール違反だ。
• それ、ルール違反だよ。

These are less polite and more conversational.

It is a correct translation, but in natural English, people often say:

• That’s against the rules.
• That breaks the rules.
• That’s rule-breaking.

Japanese often uses noun-based expressions like ルール違反です, where English might prefer a more natural phrase.

So the Japanese structure is literally close to That is a rule violation, but the most natural English translation may be That’s against the rules.

Not directly.

The sentence only says:

• That is a rule violation
• That is against the rules

It describes the thing marked by それ. It does not directly name who did it.

However, in context, if someone points to what another person is doing, it can strongly imply:

• What you’re doing is against the rules.

So the sentence itself is not explicitly you are breaking the rules, but it can function that way in real conversation.

No, that is not correct.

The problem is that 違反 does not work with を that way.

The correct patterns are:

• ルール違反です = It is a rule violation.
• ルールに違反する = to violate the rules

So if you want a noun-style sentence, use:

• それはルール違反です。

If you want a verb-style sentence, use something like:

• それはルールに違反しています。
  = That violates the rules. / That is in violation of the rules.

Japanese sentence structure is usually very different from English.

English:

• That is a rule violation.

Japanese:

• That + topic + rule violation + is

So:

• それ = that
• は = topic marker
• ルール違反 = rule violation
• です = is

Japanese often places the main predicate at the end. This is a very basic pattern:

• A は B です
  = A is B

So this sentence is a very standard example of that structure.

It is polite neutral.

Because it ends with です, it is appropriate in many everyday situations:

• speaking politely
• explaining rules
• correcting someone in a non-rude way
• classroom or workplace situations

Casual versions include:

• それはルール違反だ。
• それ、ルール違反。

More formal or official wording might be:

• それは規則違反です。

That sounds a bit more formal or institutional than ルール違反です.

Both can relate to rules, but the nuance is a little different.

• ルール is a loanword from English and often feels everyday, practical, or conversational.
• 規則 is a native Japanese/Sino-Japanese word and can sound more formal, official, or written.

So:

• ルール違反です = common, natural, everyday
• 規則違反です = more formal, official, institutional

Both are possible, but ルール違反です sounds very natural in ordinary speech.

ルール is pronounced roughly ruu-ru.

A few points:

• ル = ru
• ー means the vowel is held longer
• so ルー is a long ruu
• then another ル

So the word has a long vowel in the middle:

• ルール = ruu-ru

Since it is a loanword, it comes from English rule, but the Japanese pronunciation follows Japanese sound patterns.

Yes, very often.

If the topic is already clear from context, Japanese frequently leaves it out.

So instead of:

• それはルール違反です。

someone might simply say:

• ルール違反です。

That can still mean:

• That is against the rules.
• It’s a rule violation.

Japanese often omits information that both people already understand from context.