nyuusha no hi wa, shorui o jisansuru koto ni natte imasu.

topic particle

Breakdown of nyuusha no hi wa, shorui o jisansuru koto ni natte imasu.

• を: direct object particle
• の: possessive case particle
• 日ひ: day

Questions & Answers about nyuusha no hi wa, shorui o jisansuru koto ni natte imasu.

How is 入社の日 read, and what does の do here?

入社の日 is read にゅうしゃ の ひ.

• 入社 = joining a company / entering a company
• 日 = day
• の links the two nouns

So 入社の日 literally means the day of joining the company, or more naturally, the day you start at the company.

Here, の works like of or an apostrophe-s in English:

• 入社の日 = the company-entry day / the day of joining the company

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Why is there は after 日 instead of に?

In this sentence, は marks 入社の日 as the topic:

• 入社の日は、... = As for the day you join the company, ...

This gives the sentence a framing feeling: it sets up the situation first, then tells you what is true in that situation.

If you used に, you would simply mark the time:

• 入社の日に書類を持参することになっています。

That version is also natural, but it feels more like a straightforward statement of timing:

• It has been decided that you bring the documents on the day you join.

With は, there is a slight sense of contrast or emphasis:

• On the joining day, this is what applies.

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What does 持参する mean, and why use it instead of something like 持ってくる?