kaze no syouzyou ga aru node, asita ha asaitiban ni naika he ikimasu.

風邪の症状 literally means cold symptoms or symptoms of a cold.

The particle の connects two nouns. In this sentence:

• 風邪 = a cold
• 症状 = symptoms
• 風邪の症状 = symptoms related to a cold

You can think of の here as working like of in English, although in natural English we often say cold symptoms instead of symptoms of a cold.

Other similar examples:

• 日本の文化 = Japanese culture / the culture of Japan
• 頭の痛み = headache / pain in the head

In 症状がある, が marks the thing that exists or is present.

• 症状がある = there are symptoms / symptoms are present

The verb ある is often used with が to show that something exists:

• 時間がある = I have time / there is time
• 問題がある = there is a problem
• 熱がある = I have a fever

Why not を?
Because ある is not an action done to an object. It means to exist or to be present, so the noun before it is not a direct object.

Why not は?
You can sometimes use は for contrast or topic marking, but the basic pattern is Noun が ある.

ある is used because symptoms are treated as things that exist or are present, not as living beings.

In Japanese:

• ある is used for inanimate things and abstract things
• いる is used for animate beings like people and animals

So:

• 症状がある = symptoms are present
• 熱がある = there is a fever
• 咳がある = there is a cough

Even though symptoms belong to a person, the symptoms themselves are not alive, so ある is correct.

ので means because or since.

So:

• 風邪の症状があるので = because I have symptoms of a cold / since I have cold symptoms

Compared with から, ので usually sounds:

• a bit softer
• a bit more explanatory
• a bit more formal or neutral

For example:

• 風邪の症状があるので、明日行きます。
  Because I have cold symptoms, I’ll go tomorrow.
• 風邪の症状があるから、明日行きます。
  Because I have cold symptoms, I’ll go tomorrow.

Both are correct, but ので often sounds a little less direct and more matter-of-fact.

In 明日は, the は marks tomorrow as the topic or time frame.

• 明日 = tomorrow
• 明日は = as for tomorrow / tomorrow

This often gives a slight sense of speaking about tomorrow in particular, or contrasting it with other times.

Compare:

• 明日行きます。 = I’m going tomorrow.
• 明日は行きます。 = I’ll go tomorrow. / As for tomorrow, I’ll go.

The version with は can sound slightly more like the speaker is setting tomorrow apart from other days.

朝一番 means first thing in the morning.

Breakdown:

• 朝 = morning
• 一番 = number one / first / the most

Together, 朝一番 means the earliest thing in the morning or the first available time in the morning.

Examples:

• 朝一番に会社へ行く = go to the office first thing in the morning
• 朝一番の電車 = the first train in the morning

In this sentence, it means the speaker plans to go to the internal medicine clinic very early tomorrow morning.

The に marks a specific time point.

• 朝一番に = first thing in the morning

Japanese often uses に with a specific time when something happens:

• 7時に起きます = I wake up at 7
• 明日の朝に行きます = I’ll go tomorrow morning
• 朝一番に行きます = I’ll go first thing in the morning

Not every time expression needs に, but with expressions like 朝一番, using に is very natural.

内科 means internal medicine or the internal medicine department/clinic.

In this sentence, it refers to going to a doctor or clinic for general internal medicine, such as for a cold.

• 内科へ行きます = I’m going to the internal medicine clinic/department

The particle へ marks the direction or destination of movement.

• 学校へ行く = go to school
• 病院へ行く = go to the hospital
• 内科へ行く = go to the internal medicine clinic

You could also say 内科に行きます. In many cases, へ and に are both possible with 行く.
Very roughly:

• へ emphasizes direction
• に emphasizes destination

But in everyday Japanese, the difference is often small.

Japanese non-past forms like 行きます can mean either:

• present/habitual, or
• future

The exact meaning depends on context.

Here, because the sentence includes 明日 and 朝一番, it clearly refers to the future:

• 明日は朝一番に内科へ行きます。 = Tomorrow I’ll go to the internal medicine clinic first thing in the morning.

Japanese does not usually have a separate future tense the way English does with will. The regular non-past form often covers future meaning.

Yes, the subject is omitted, and that is very normal in Japanese.

The sentence does not explicitly say I, but from context we understand:

• I have symptoms of a cold
• I will go to the internal medicine clinic tomorrow morning

Japanese often leaves out subjects and objects when they are obvious from context. English usually requires them, but Japanese often does not.

So the full idea is something like:

• (I) have symptoms of a cold, so (I) will go to the internal medicine clinic first thing tomorrow morning.

No. In normal Japanese writing, spaces are usually not placed between words like this.

The natural written form would be:

風邪の症状があるので、明日は朝一番に内科へ行きます。

Spaces are often added in learning materials to help beginners see word boundaries more easily, but standard Japanese normally does not use them this way.