kaigi no zyunbi ha zyuntyou ni susunde imasu.

The sentence is read:

かいぎ の じゅんび は じゅんちょう に すすんで います。
Romanized: kaigi no junbi wa junchō ni susunde imasu

Word by word:

• 会議 = かいぎ = meeting, conference
• の = no
• 準備 = じゅんび = preparation
• は = written は but pronounced wa here because it is the topic particle
• 順調 = じゅんちょう = going smoothly, favorable, on track
• に = ni
• 進んでいます = すすんでいます = is progressing / has been progressing

の links nouns together. It often works like of or like the English possessive/apostrophe structure.

So:

• 会議の準備 = the preparation for the meeting
• literally, something like meeting’s preparation or preparation of the meeting

In Japanese, this noun + の + noun pattern is extremely common.

は marks the topic of the sentence: what the sentence is about.

So 会議の準備は means:

• As for the meeting preparations...
• Regarding the preparation for the meeting...

Then the rest of the sentence says something about that topic: it is progressing smoothly.

This is very natural Japanese structure:

• X は Y です
• As for X, it is Y

Here:

• 会議の準備は 順調に進んでいます
• As for the meeting preparations, they are progressing smoothly

Yes, が is possible in some contexts, but it changes the nuance.

• 会議の準備は順調に進んでいます。

  • Topic-focused
  • Natural when you are already talking about the preparations, or introducing them as the topic

• 会議の準備が順調に進んでいます。

  • Subject-focused
  • Can sound a bit more like the preparations are the thing that is going smoothly

In many situations both are possible, but は often feels more neutral or conversational when talking about an ongoing situation.

順調 means something like:

• smooth
• favorable
• on track
• going well

It is a na-adjective when it modifies a noun:

• 順調な進み = smooth progress

But when it modifies a verb, it usually takes に and acts adverbially:

• 順調に進む = to progress smoothly

So in this sentence:

• 順調に = smoothly / favorably / without problems
• 進んでいます = is progressing

Together:

• 順調に進んでいます = is progressing smoothly

進みます is the non-past polite form and can mean:

• progresses
• will progress
• does progress

But 進んでいます uses the ている form, which often describes an ongoing situation or current state.

So:

• 進みます = progresses / will progress
• 進んでいます = is progressing / has been progressing

In this sentence, the speaker is talking about the current state of the preparations, so 進んでいます is very natural.

The pattern is:

• dictionary form: 進む
• て-form: 進んで
• 進んでいる → polite: 進んでいます

For many verbs, ている means an ongoing action:

• 食べている = is eating

But for some verbs, it can also describe a continuing state or situation. With 進む, 進んでいる usually means:

• is advancing
• is moving forward
• is making progress

So here, the preparations are in the state of moving forward smoothly.

Yes, 進む literally means to advance, to go forward, or to proceed. But in Japanese it is also commonly used for things like:

• plans progressing
• work moving along
• preparations advancing
• negotiations proceeding

So 準備が進む is a very natural expression meaning:

• preparations advance
• preparations make progress
• preparations proceed

That is why 会議の準備は順調に進んでいます sounds natural for The preparations for the meeting are going smoothly.

Because 進む is a godan verb ending in -む, and its て-form changes like this:

• 読む → 読んで
• 飲む → 飲んで
• 進む → 進んで

So:

• 進む
• 進んで
• 進んでいます

This is just a standard て-form conjugation pattern you need to memorize for -む / -ぶ / -ぬ verbs:

• they become -んで

準備 is basically a noun meaning preparation.

But it can also be used with する to make a verb:

• 準備 = preparation
• 準備する = to prepare

In this sentence, it is being used as a noun:

• 会議の準備 = the preparation for the meeting

The main verb of the sentence is not 準備する but 進んでいます.

Yes, that is also grammatical, but the nuance is a little different.

• 会議の準備は順調です。

  • The preparations are going well / are on track.
  • More direct and descriptive

• 会議の準備は順調に進んでいます。

  • The preparations are progressing smoothly.
  • Emphasizes movement and ongoing progress

So the original sentence focuses more on the fact that things are moving forward well, not just that the overall situation is good.

Normally, no. In this sentence, 順調 is modifying the verb 進んでいます, so に is needed.

• 順調に進んでいます = progressing smoothly

Without に, it would sound unnatural.

A good comparison:

• 静かだ = is quiet
• 静かに話す = speak quietly

Similarly:

• 順調だ = is going smoothly / is favorable
• 順調に進む = to progress smoothly

It uses います, which is part of the polite ます style.

Compare:

• plain: 会議の準備は順調に進んでいる。
• polite: 会議の準備は順調に進んでいます。

The polite version is very common in normal conversation, business situations, and formal speech. Since this sentence is about meeting preparations, the polite style fits very naturally.

Yes, very much so. Expressions like these are common in workplaces and formal settings:

• 準備が進んでいます = preparations are progressing
• 順調に進んでいます = things are progressing smoothly
• 計画が進んでいます = the plan is moving forward

Because the sentence is about a meeting and uses a polite, neutral style, it sounds very natural in office or professional Japanese.

A useful breakdown is:

• 会議の準備 = preparation for the meeting
• は = topic marker
• 順調に = smoothly
• 進んでいます = is progressing

So the structure is:

[Topic] は [adverb] [verb]

Or more specifically:

[Noun phrase] は [na-adjective + に] [ている-form verb]

That makes it a very useful model sentence you can reuse, such as:

• 旅行の準備は順調に進んでいます。
  The preparations for the trip are progressing smoothly.

• プロジェクトは順調に進んでいます。
  The project is progressing smoothly.