tennyuutodoke wo teisyutusuru ni sakidatte, tensyutusyoumeisyo wo zyunbisuru.

に先立って means before, prior to, or in advance of.

In this sentence, it links two actions:

• 転入届を提出する = submitting the move-in notification
• 転出証明書を準備する = preparing the moving-out certificate

So the structure means:

• Before submitting the move-in notification, prepare the moving-out certificate.

A key point is that に先立って sounds more formal and official than the very common 前に.

Both can mean before, but they have different tones.

• 前に = the normal, everyday way to say before
• に先立って = more formal, stiff, and often used in official instructions, announcements, business writing, and administrative documents

Since this sentence is about government paperwork, に先立って fits the formal style well.

Compare:

• 転入届を提出する前に、転出証明書を準備する。
  = natural and clear, but plainer

• 転入届を提出するに先立って、転出証明書を準備する。
  = more official-sounding

Yes, 提出に先立って would also be natural.

With に先立って, you can often attach it to:

• a noun
• or a dictionary-form verb

So both of these work:

• 転入届を提出するに先立って
• 転入届の提出に先立って
• sometimes simply 提出に先立って, depending on context

The version with 提出する focuses on the action as a verb: before submitting.

The version with 提出 treats it more as an event or act: prior to the submission.

In official writing, the noun style is often especially common:

• 転入届の提出に先立って、…

These are administrative terms related to moving residence in Japan.

• 転入届（てんにゅうとどけ）

  • 転入 = moving into a municipality
  • 届 = notification/report
  • So this is the move-in notification you submit when you move into a new city, ward, or town.

• 転出証明書（てんしゅつしょうめいしょ）

  • 転出 = moving out of a municipality
  • 証明書 = certificate
  • So this is the certificate of moving out, which you usually receive from your old municipality and then bring to the new one.

So the sentence is talking about the normal procedure: first get or prepare the 転出証明書, then submit the 転入届.

Because both are the direct objects of verbs.

• 転入届を提出する

  • submit the move-in notification

• 転出証明書を準備する

  • prepare the moving-out certificate

The particle を marks the thing being acted on.

So the pattern is:

• X を 提出する = submit X
• Y を 準備する = prepare Y

Even though the whole sentence has a before relationship, each verb still keeps its own object marked by を.

Japanese often leaves out the subject when it is obvious from context.

This sentence does not explicitly say:

• you
• the resident
• the applicant
• one

But from the context of instructions, the implied subject is something like:

• you
• or the person moving

So the sentence functions like an instruction:

• Before submitting the move-in notification, prepare the moving-out certificate.

This kind of subject omission is extremely common in Japanese, especially in:

• instructions
• manuals
• signs
• official guidance

Yes. 準備する means to prepare, to get ready, or to have something ready.

In this context, it usually means something like:

• make sure you have the 転出証明書
• gather it beforehand
• have it ready for the procedure

So it may or may not mean physically creating the document yourself. More often, it means obtain it and have it ready to present.

In administrative Japanese, 準備する often means practical readiness, not just mental preparation.

It most naturally reads as an instruction or procedural direction.

Even though there is no explicit command form like:

• 準備してください

Japanese official writing often uses plain non-past forms to state procedures in a neutral, instructional way.

So this sentence feels like:

• Prepare the moving-out certificate before submitting the move-in notification.

rather than a simple factual statement about what someone happens to do.

The verb 先立つ（さきだつ） basically means to precede or to come before.

In the expression に先立って:

• A に先立って B
• = B happens before A
• = prior to A, do B

So in this sentence:

• 転入届を提出するに先立って、転出証明書を準備する。

the preparation of the certificate happens first, and the submission happens later.

This expression emphasizes that the second action should be done as a preliminary step.

It is grammatical and natural, but it sounds quite formal and bureaucratic.

In everyday conversation, a Japanese speaker would be more likely to say something like:

• 転入届を出す前に、転出証明書を用意してください。
• 転入届を提出する前に、転出証明書を準備してください。

These are more conversational and direct.

The original sentence sounds more like something you would read in:

• a city office notice
• a website explaining procedures
• an application guide
• official paperwork instructions

The comma marks a pause between the before-clause and the main action.

Structure:

• 転入届を提出するに先立って、
• 転出証明書を準備する。

So the comma helps show that the first part is a setup:

• Before submitting the move-in notification, ...

and the second part is the main instruction:

• ... prepare the moving-out certificate.

Japanese commas are somewhat flexible, but here the comma is very natural and makes the sentence easier to read.