kono sigoto ni ha gizyutu ga hituyou desu.

A common reading is:

この しごと には ぎじゅつ が ひつよう です。

Word by word:

• この = this
• 仕事（しごと） = job, work
• には = に
  • は
• 技術（ぎじゅつ） = skill, technique, technical ability
• 必要（ひつよう） = necessary, needed
• です = polite sentence ending, is/are

So the whole sentence is read:

このしごとには ぎじゅつが ひつようです。

The sentence is structured like this:

この仕事には / 技術が / 必要です。

A very literal breakdown is:

• この仕事には = for this job / as for this job
• 技術が = skill(s) / technical ability
• 必要です = is necessary

So the core pattern is:

A には B が 必要です = B is necessary for A = A requires B

That is why the sentence can naturally mean:

• This job requires skill.
• Technical skill is necessary for this job.

Because には is actually two particles combined:

• に marks the target or area something applies to: for, in, to
• は marks the topic: as for...

So:

• この仕事に = for this job
• この仕事には = as for this job / for this job, at least

In this sentence, に shows what the necessity is related to, and は makes that whole phrase the topic.

So この仕事には技術が必要です feels like:

• As for this job, skill is necessary.

The は can also give a slight contrast depending on context, like:

• For this job, skill is necessary (maybe unlike some other jobs)

Because 技術 is the thing that is necessary.

In the pattern:

A には B が 必要です

the B is marked with が, because it is the thing being identified as needed.

So here:

• この仕事には = for this job
• 技術が = skill is what...
• 必要です = ...is necessary

This is very natural Japanese.

A useful way to think of it is:

• What is necessary for this job?
• 技術が必要です = Skill is necessary.

That is why が fits well here.

必要 means necessary or needed.

It behaves like a na-adjective (sometimes also explained as a noun-like adjective). When it comes at the end of a sentence, it is followed by です in polite speech:

• 必要です = is necessary

But when it comes before a noun, it takes な:

• 必要な技術 = necessary skills

So compare:

• 技術が必要です。 = Skill is necessary.
• 必要な技術です。 = It is a necessary skill.

That is why this sentence uses 必要です, not 必要なです.

Because この directly modifies the noun that follows it.

So:

• この仕事 = this job

この must be attached to a noun. It cannot stand alone.

Compare:

• この仕事 = this job
• この本 = this book
• この人 = this person

If you want to say this one by itself, Japanese uses これ, not この.

So:

• この仕事 = this job
• これは仕事です = this is a job

Not usually in this sentence.

技術（ぎじゅつ） often means:

• skill
• technique
• technical ability
• expertise

It can sometimes refer to technology in a broad sense, but in a sentence like this, it usually means practical skill or specialized ability.

So here, この仕事には技術が必要です most naturally means:

• This job requires skill.
• This job requires technical ability.

If the idea were specifically technology as a field or system, other words might be more natural depending on context.

Because the sentence is talking about what is necessary for the job, not what happens at the job or by means of the job.

• に here shows the target or context of necessity: for this job
• で often marks the place of an action, means, or situation in which something happens

So:

• この仕事には技術が必要です。 = This job requires skill.

If you used で, the sentence would sound different and would not express the same relationship as naturally.

The pattern N には X が必要です is the standard way to say:

• N needs X
• X is necessary for N

Yes, you may hear that, and it can be understood, but この仕事には技術が必要です is more explicit and standard for the meaning skill is necessary for this job.

Why?

Because 必要 often pairs naturally with に:

• A に B が必要です = B is necessary for A

If you say:

• この仕事は技術が必要です

it still sounds understandable, but it can feel a little less tightly connected grammatically, because the for relationship is not marked as clearly.

So for learners, この仕事には技術が必要です is the safer and more natural model.

Sometimes, yes.

The は in には can simply mark the topic, but it can also suggest contrast depending on context.

For example, in a conversation like:

• この仕事には技術が必要です。あの仕事には体力が必要です。

the contrast is clear:

• This job requires skill.
• That job requires physical strength.

Even by itself, には can slightly imply:

• as for this job
• at least for this job
• when it comes to this job

But the contrast is often very soft unless the context makes it stronger.

No specific person is stated.

Japanese often leaves out subjects when they are not needed. This sentence is not saying:

• You need skill for this job or
• We need skill for this job

Instead, it states the situation more generally:

• For this job, skill is necessary.

That is one reason Japanese sentences often sound less personal and more neutral than direct English translations.

A casual version would be:

この仕事には技術が必要だ。

Differences:

• 必要です = polite
• 必要だ = plain / casual

You might also hear:

• この仕事には技術が要る。 = This job needs skill.

That version uses 要る（いる）, which also means to need.

So:

• 技術が必要です = skill is necessary
• 技術が要ります = skill is needed

Both are natural, but 必要です sounds a bit more formal or explanatory.

They are close in meaning, but the grammar and nuance are slightly different.

1. 必要です
   • more like is necessary
   • sounds somewhat formal, objective, descriptive

Example:

• この仕事には技術が必要です。 = Technical skill is necessary for this job.

2. 要ります
   • from 要る, meaning to need
   • more directly like is needed

Example:

• この仕事には技術が要ります。 = This job needs skill.

Both are correct and natural. For learners, A には B が必要です is an especially useful pattern to remember.

Because natural translation and literal structure are not always the same.

Japanese says:

• この仕事には = for this job
• 技術が必要です = skill is necessary

That is literally closer to:

• Skill is necessary for this job.

But in natural English, we often prefer:

• This job requires skill.

Both express the same idea. So the Japanese grammar is not using a direct verb meaning require here; instead, it uses the pattern X is necessary for Y.

That is a very common feature of Japanese: the most natural English translation may use a different structure from the Japanese original.