yaei no ato, takibi no syouka wo kakuninsita.

A common reading is:

やえい の あと、たきび の しょうか を かくにんした。

Word by word:

• 野営 = やえい
• 後 = あと
• 焚き火 = たきび
• 消火 = しょうか
• 確認した = かくにんした

So the rhythm is:

やえい の あと、たきび の しょうか を かくにんした。

Here, の links 野営 and 後.

So:

• 野営 = camping out / making camp in the field
• 後 = after

Together, 野営の後 means after camping out or more literally after the camping.

This is a very common pattern:

• 食事の後 = after the meal
• 授業の後 = after class
• 仕事の後 = after work

So noun + の + 後 is a standard way to say after noun.

This の also links two nouns, but the relationship is a little different.

• 焚き火 = campfire
• 消火 = extinguishing a fire / putting out a fire

So 焚き火の消火 means:

• the extinguishing of the campfire
• putting out the campfire

In natural English, we usually would not say the campfire’s extinguishing, but that is close to the structure in Japanese.

So this の is showing what kind of 消火 it is: specifically, the extinguishing of the campfire.

消火 is a noun meaning extinguishing a fire or fire extinguishing. It is more formal and technical than everyday 火を消す.

Compare:

• 焚き火を消した。
  = I put out the campfire.
  This is direct and everyday.

• 焚き火の消火を確認した。
  = I confirmed that the campfire had been extinguished.
  This sounds more formal, like a report, rule, checklist, or safety procedure.

So 消火 is used because the sentence is talking about the state or act of extinguishing as something to be checked.

No, 確認した is stronger than just looked at.

確認する means:

• to confirm
• to check
• to make sure

So the idea is not simply I looked at the fire, but rather:

• I checked to make sure it was properly out
• I confirmed the extinguishing of the campfire

This word is often used when safety or correctness matters.

Examples:

• 予約を確認した。 = I confirmed the reservation.
• 身分証を確認した。 = I checked the ID.
• 戸締まりを確認した。 = I checked that the doors were locked.

Because 確認した takes a direct object, and here the thing being confirmed is 焚き火の消火.

Structure:

• 焚き火の消火 = the extinguishing of the campfire
• を確認した = confirmed it

So the sentence is literally:

After camping out, [someone] confirmed the extinguishing of the campfire.

The thing being confirmed is not 焚き火 by itself, but 焚き火の消火.

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

So 確認した just means confirmed / checked, without explicitly saying:

• I confirmed
• we confirmed
• they confirmed

The subject has to be understood from the situation.

Depending on context, this sentence could mean:

• I confirmed that the campfire was out
• We confirmed that the campfire was out
• They confirmed that the campfire was out

This omission is very normal in Japanese.

Both are possible, but they feel a little different.

• 野営の後 = after the camping / after camp
• 野営した後 = after having camped out

Because 野営 can function as a noun, 野営の後 is natural and compact.

Compared with 野営した後, the version with の can sound a bit more like:

• a written report
• an instruction
• a formal description

So in this sentence, 野営の後 fits the somewhat formal style.

It is understandable, but it is not the most casual everyday word for camping.

野営 tends to sound:

• more formal
• more rugged
• more like encampment, camping out, or bivouacking

In casual conversation, people often say:

• キャンプ
• キャンプする

So:

• キャンプの後、焚き火が消えているか確認した。
  sounds more conversational.

But 野営の後、焚き火の消火を確認した。
sounds more formal, concise, and report-like.

Yes, it is natural, especially in formal or written contexts.

It sounds like something you might see in:

• a report
• a safety manual
• a logbook
• an official record
• an outdoor activity guideline

The sentence is compact and noun-heavy:

• 野営
• 消火
• 確認

That makes it sound more formal than everyday spoken Japanese.

A more casual spoken version might be:

• キャンプのあと、焚き火がちゃんと消えているか確認した。

That means essentially the same thing, but it sounds more conversational.

後 simply means after. By itself, it does not always tell you exactly how much time passed.

So 野営の後 means:

• after camping out
• after the camp

It does not automatically mean:

• immediately after
• much later after

The exact timing depends on context.

If the speaker wanted to emphasize sequence more clearly, they might use other phrasing, but in this sentence 後 is enough to show that the confirmation happened after the camping.

In practice, it usually means they checked the result: that the campfire had been properly extinguished.

Even though 消火 literally refers to extinguishing, with 確認した the natural meaning is:

• they confirmed the campfire was out
• they made sure the fire had been fully extinguished

So the focus is usually on the completed safe state, not on watching the act of putting it out.

Because it uses several Sino-Japanese, somewhat official-sounding words:

• 野営 instead of キャンプ
• 消火 instead of 火を消す
• 確認した instead of something simpler like 見た or 確かめた

Japanese often becomes more formal and concise by packing information into nouns like this.

Compare:

Formal:

• 野営の後、焚き火の消火を確認した。

More conversational:

• キャンプのあと、焚き火が消えているかちゃんと確かめた。

Both are natural, but the first sounds more like written documentation.