syainsyou wo keitaisimasu.

を marks 社員証 as the direct object of the verb 携帯します.

• 社員証 = the thing being carried
• 携帯します = carry / keep on one’s person

So the structure is:

• 社員証
  • を
    • 携帯します
• company ID badge
  • object marker
    • carry

This is very similar to how English uses a direct object after a verb, as in carry an ID badge.

携帯します is the polite non-past form of 携帯する.

Breakdown:

• 携帯する = dictionary form
• 携帯します = polite form

The non-past in Japanese can refer to:

• a present habit
• a future action
• a general rule or instruction

So depending on context, 携帯します could mean something like:

• I carry my employee ID
• We carry employee IDs
• Please carry your employee ID / Employees must carry their ID
  (especially in workplace rules or manuals)

Not exactly.

Both can relate to carrying, but 携帯する is more formal and has a specific nuance of carrying something with you on your person.

Compare:

• 持つ / 持ちます = to hold, to have, to carry
  → more general
• 携帯する / 携帯します = to carry with you, to keep on you
  → more formal, often used in rules, instructions, and official language

With 社員証, 携帯します sounds very natural in a workplace or rule-setting context.

Because Japanese often omits the subject when it is understood from context.

In English, you usually need to say who is doing the action:

• I carry my employee ID
• Employees carry their employee IDs
• You should carry your employee ID

In Japanese, if the context already makes that clear, the subject is often left out.

So 社員証を携帯します could imply:

• I carry my employee ID
• We carry our employee IDs
• Employees must carry their employee IDs

You determine the subject from the situation, not from the sentence alone.

It can be either, depending on context.

On its own, 社員証を携帯します is grammatically just a polite non-past sentence. But in real life, context matters a lot.

Possible interpretations:

• statement: I carry my employee ID
• company rule / instruction: Carry your employee ID
• manual-style instruction: Employees shall carry their employee IDs

In workplace notices, manuals, training materials, and rule lists, Japanese often uses this kind of plain polite sentence to express what people are supposed to do.

Yes, if you are directly asking someone to do it, 社員証を携帯してください is clearer.

Compare:

• 社員証を携帯します
  → can sound like a statement, policy, or formal rule
• 社員証を携帯してください
  → clearly means Please carry your employee ID

So if this appears in a handbook or rule list, 携帯します can be natural.
If a person is speaking directly to another person, 携帯してください is often more straightforward.

Yes. It is the same word 携帯.

• 携帯 = carrying something with you / portable
• 携帯電話 = mobile phone / cell phone

So the core idea of 携帯 is something you carry with you.

In 社員証を携帯します, it keeps that same basic idea:

• to carry your employee ID with you

It is read しゃいんしょう.

Breakdown:

• 社員 = しゃいん = employee
• 証 = しょう = certificate / proof / card

Together:

• 社員証 = しゃいんしょう

A good thing to notice is that 証 is read しょう here, not あかし.

You’re right: standard Japanese normally does not use spaces.

So in normal writing, this would usually appear as:

• 社員証を携帯します。

Spaces are often added in beginner materials to make the sentence easier to read and to show word boundaries.

So:

• with spaces = learner-friendly formatting
• without spaces = normal Japanese writing

It specifically means an employee ID card / company ID badge.

It is more specific than a general word like:

• 身分証明書 = identification document / ID
• IDカード = ID card

So 社員証 tells you that this is the ID that proves someone is an employee of a company.

That is why it fits naturally with workplace rules such as wearing it, showing it, or carrying it.

Yes, but it would change the focus.

Original:

• 社員証を携帯します
• neutral description of the action: carry the employee ID

With は:

• 社員証は携帯します
• this sounds like As for the employee ID, I do carry it
• it may suggest contrast, such as:
  • I carry my employee ID, but not something else
  • At least the employee ID, I carry

So を is the normal choice if you are simply stating the action.
は adds topical or contrastive emphasis.