asita no kaigi ni ha, siroi syatu wo kite ikimasu.

明日の会議 means tomorrow’s meeting or the meeting tomorrow.

The particle の connects 明日 and 会議, showing that 明日 modifies 会議.

• 明日 = tomorrow
• 会議 = meeting
• 明日の会議 = tomorrow’s meeting

Japanese often uses noun + の + noun where English might use either:

• tomorrow’s meeting
• the meeting tomorrow

Saying 明日会議 by itself would sound incomplete or unnatural in normal standard Japanese.

には is に + は.

• に marks the target, time, or occasion related to the action
• は marks the topic and often adds contrast or emphasis

So 会議には means something like:

• for the meeting
• as for the meeting
• to the meeting, with a bit of emphasis

In this sentence, は can suggest contrast such as:

• At least for tomorrow’s meeting, I’ll wear a white shirt
• Maybe for other situations, the clothing could be different

Without は, 会議に would still be correct, but には gives a slightly more marked, topic-like feel.

Here, に marks the event or destination that the speaker is going to.

With 行く, Japanese often uses に for a destination or goal:

• 学校に行く = go to school
• 会議に行く = go to a meeting

Even though a meeting is an event, Japanese treats it as the place or occasion you are going to.

Using へ is sometimes possible with physical destinations, but with 会議, に is more natural.

白い is an い-adjective, so it directly modifies the noun:

• 白いシャツ = a white shirt

You do not use な with 白い, because 白い is not a な-adjective.

About 白のシャツ:

• This can appear in some contexts, but it sounds more like a shirt of the color white
• It is less basic and less natural here than 白いシャツ

So for a simple description, 白いシャツ is the normal choice.

Because シャツ is the thing being worn, and 着る takes a direct object.

• シャツを着る = wear a shirt / put on a shirt

So in the sentence:

• 白いシャツを着て = wearing a white shirt / put on a white shirt and...

The particle を marks what receives the action of 着る.

Because the speaker is not only saying I wear a white shirt, but specifically I go wearing a white shirt.

The pattern is:

• て-form + 行く

In this sentence, 着て行きます means the speaker will go to the meeting in that state, wearing the shirt.

This is different from just 白いシャツを着ます, which only says I will wear a white shirt and does not clearly connect that action to going to the meeting.

Usually it suggests go while wearing it.

With clothing verbs like 着る, 〜て行く often expresses a resulting state that continues to the destination:

• 帽子をかぶって行く = go wearing a hat
• コートを着て行く = go wearing a coat

So here, the natural understanding is:

• the speaker will be wearing the white shirt when they go to the meeting

It can include the idea of putting it on before leaving, but the important point is the state at the destination.

In Japanese, the main verb usually comes at the end of the sentence.

Here:

• 着て is the て-form of 着る
• 行きます is the main final verb

The て-form connects actions or states to the final verb. So the structure is roughly:

• wearing a white shirt, [I] will go

That is why 行きます comes last.

Yes. Both are common.

• 着て行きます
• 着ていきます

They mean the same thing here.

Writing it with kanji, 行く, can make the original verb clearer. Writing it in hiragana, いく, is also very common, especially when 〜ていく functions more like a grammatical pattern than a literal go.

Japanese often omits subjects when they are obvious from context.

So this sentence does not need 私は if it is already clear who is speaking or who will wear the shirt.

English usually needs a subject:

• I will go...

Japanese often leaves it unstated:

• 明日の会議には、白いシャツを着て行きます。

The listener normally understands the subject from context.

It could mean either, depending on context.

Japanese does not have articles like a and the, so:

• 白いシャツ could be a white shirt
• or the white shirt

Japanese also does not force singular vs. plural in the same way English does, though here shirt is naturally understood as singular unless context suggests otherwise.

No, it is not grammatically required.

The comma simply adds a pause and can make the sentence easier to read. It may also help show that 明日の会議には is being set up as the topic or context before the main statement.

So these are both fine:

• 明日の会議には、白いシャツを着て行きます。
• 明日の会議には白いシャツを着て行きます。

The meaning is the same.

Yes, and it is quite natural, but the nuance is a little different.

• 白いシャツを着て行きます focuses on the action/state of wearing a white shirt and going
• 白いシャツで行きます focuses more on the outfit or appearance I’ll go in a white shirt

Both can work in everyday Japanese.
The original sentence is a very clear learner-friendly example because it directly uses the verb 着る.