iryou ha zyuuyou desu.

It is read:

いりょう は じゅうよう です。

In normal Japanese writing, it would usually be written without spaces:

医療は重要です。

This is one of the first unusual things learners notice.

The character は is normally read ha, but when it is used as the topic particle, it is pronounced wa.

So in this sentence:

医療は重要です。
= As for medical care, it is important.

Here, は marks 医療 as the topic of the sentence.

は marks the topic.

So 医療は means something like:

• as for medical care
• medical care, ...
• when it comes to medical care, ...

Then the rest of the sentence says something about that topic:

重要です = is important

So the whole structure is:

[topic] は [comment] です

In this case:

• 医療 = medical care / healthcare
• は = topic marker
• 重要です = is important

重要 is a na-adjective in Japanese.

That means it can describe something as important, but it behaves differently from English adjectives.

For example:

• 重要です = is important
• 重要な問題 = an important problem

Notice the な before a noun:

• 重要な + noun

But when 重要 is used as the predicate at the end of a sentence, it does not need な:

• 医療は重要です。

Japanese sentence structure is different from English.

In English, you say:

Medical care is important.

In Japanese, the main predicate comes at the end:

医療は 重要 です。

The です at the end works like a polite copula, similar to is / am / are in meaning, though not exactly the same in grammar.

So the sentence literally follows a pattern more like:

Medical care — important — polite ending

This is completely normal in Japanese.

Because 重要 is the predicate here.

In 医療は重要です, the sentence ends with 重要です, which means is important. Since 重要 is directly followed by です, no extra particle is needed.

A learner may expect something after every word, but Japanese does not work that way. Particles usually mark nouns and their roles. Here:

• 医療 is marked by は
• 重要です is the statement being made about 医療

Yes, you can, but the nuance changes.

医療は重要です。
This sounds like a general statement: Medical care is important.

医療が重要です。
This puts more focus on medical care itself, often in contrast to other things, such as:

• What is important? — Medical care is important.
• It is medical care that is important.

So:

• は = topic, general statement, broader context
• が = focus, identification, emphasis

For a simple general sentence, は is the more natural choice.

です makes the sentence polite.

So:

• 医療は重要です。 = polite
• 医療は重要だ。 = plain / casual
• 医療は重要。 = very casual, often used in speech or notes

For beginners, です is usually the safest form to use in normal conversation or writing.

Not exactly.

医療（いりょう） usually means:

• medical care
• healthcare
• medical treatment

It refers more to the system or practice of treating patients than to the academic field of medicine.

For comparison:

• 医療 = healthcare / medical care
• 医学（いがく） = medical science / the study of medicine
• 薬（くすり） = medicine as in a drug or remedy

So in this sentence, 医療 means something like healthcare or medical care is important.

No. Japanese is normally written without spaces.

So the standard written form is:

医療は重要です。

Spaces are often added in beginner materials to make the sentence easier to read, but native Japanese writing usually does not use them.

Yes, both can be translated as important, but the nuance is a little different.

• 重要 often sounds more objective, formal, or serious.
• 大切 can sound more personal, emotional, or value-based.

For example:

• 医療は重要です。 = Medical care is important.
  This sounds formal and factual.

• 家族は大切です。 = Family is important / precious.
  This sounds warmer and more personal.

So 重要 is a very natural choice in a sentence about healthcare, policy, society, or public issues.

A learner may be curious about the kanji parts:

医療（いりょう）

• 医 = medicine, medical
• 療 = treatment, therapy

So together, 医療 relates to medical treatment or healthcare.

重要（じゅうよう）

• 重 = heavy, serious, important
• 要 = need, essential point

So 重要 carries the idea of something being of great importance.

You do not need to memorize the kanji meanings to understand the sentence, but knowing them can help vocabulary stick better.