kenkousindan ga owatta monono, wakutinsessyu ha mada owatte inai.

ものの means something like although, even though, or but.

So:

• 健康診断が終わったものの = Although the health checkup is over, ... = The health checkup has finished, but ...

It connects two facts that contrast with each other. In this sentence, the contrast is:

• one thing is finished
• the other thing is still not finished

Compared with けど or が, ものの sounds a bit more formal and often appears more in writing or careful speech.

Because ものの attaches to a plain clause.

Here, the clause is:

• 健康診断が終わった = the health checkup ended / has finished

Then ものの is added to that full clause:

• 健康診断が終わったものの = although the health checkup has finished

This is a common pattern:

• Verb (plain form) + ものの
• い-adjective + ものの
• na-adjective / noun + であるものの in more formal styles

So 終わったものの is grammatically normal.

All three can show contrast, but the nuance is different.

• けど: very common, conversational, flexible
• が: also common, slightly more neutral or formal than けど
• ものの: more formal, often written, and can feel a little more like even though that is true, still...

For example:

• 健康診断は終わったけど、ワクチン接種はまだ終わっていない。 = very natural in conversation
• 健康診断は終わったが、ワクチン接種はまだ終わっていない。 = neutral/formal
• 健康診断が終わったものの、ワクチン接種はまだ終わっていない。 = more literary or formal, with a stronger sense of contrast

In 健康診断が終わった, 健康診断 is the thing that ended / finished, so it is marked as the subject with が.

• 健康診断が終わった = The health checkup ended

This is natural because 終わる is an intransitive verb. The event or thing that comes to an end is marked with が.

You could also say:

• 健康診断は終わった

That would make 健康診断 the topic instead. The original が is simply presenting the first clause as a fact: the health checkup ended.

Here, は marks ワクチン接種 as the topic and helps create a contrast:

• The health checkup is finished, but as for the vaccination, it is not finished yet.

So は helps highlight the difference between the two items.

Compare:

• ワクチン接種はまだ終わっていない = As for the vaccination, it still isn’t finished → contrastive/topic feeling

• ワクチン接種がまだ終わっていない = The vaccination hasn’t finished yet → more neutral, just stating the subject

In this sentence, は works well because the speaker is contrasting the two procedures.

終わっていない means has not finished or is not finished.

It is the negative of 終わっている, which often describes a resulting state:

• 終わっている = is finished / has ended
• 終わっていない = is not finished / has not ended

So:

• ワクチン接種はまだ終わっていない = The vaccination is still not finished

By contrast, 終わらない often means:

• does not end
• will not end
• never ends

That can sound more general, habitual, or predictive. Here the speaker is talking about the current state, so 終わっていない is the natural choice.

まだ means still or not yet, depending on the sentence.

With a negative form like 〜ていない, it usually means not yet:

• まだ終わっていない = not finished yet

Without まだ, the sentence would simply say the vaccination is not finished. With まだ, it emphasizes that completion is expected later, but has not happened so far.

So the nuance is:

• 終わっていない = is not finished
• まだ終わっていない = is not finished yet

In many cases, it can cover both ideas depending on context.

• It can mean it has started but is not complete
• It can also mean it has not been completed yet, even if it has not really begun

In this sentence, the most natural reading is simply:

• the vaccination has not been completed yet

The exact real-world situation depends on context. For example, maybe the person already had the checkup but is still waiting for the vaccine appointment, or maybe the vaccination process has begun but not fully concluded. Japanese often leaves that detail unstated.

終わる is intransitive.

That means it describes something ending by itself or coming to an end:

• 健康診断が終わる = the health checkup ends
• 授業が終わる = class ends

The transitive counterpart is 終える, meaning to finish something:

• 健康診断を終える = to finish the health checkup
• 仕事を終える = to finish the work

In this sentence, the focus is on the events themselves being completed, so 終わる is the natural verb.

Because both parts are talking about whether something has been completed.

• 健康診断が終わった = the health checkup finished
• ワクチン接種はまだ終わっていない = the vaccination has not finished yet

Using the same verb makes the contrast very clear and parallel. English might vary the wording a little, but Japanese often repeats the same verb naturally.

It is not extremely stiff, but it is somewhat formal or written-sounding, mainly because of ものの.

The vocabulary itself is also a bit official or administrative:

• 健康診断 = health checkup / medical examination
• ワクチン接種 = vaccination / vaccine administration

A more casual spoken version might be:

• 健康診断は終わったけど、ワクチン接種はまだ終わっていない。

That would sound more everyday and conversational.

Yes:

• 健康診断

  • 健康 = health
  • 診断 = diagnosis / examination
  • together: health checkup, medical checkup

• ワクチン接種

  • ワクチン = vaccine
  • 接種 = inoculation / administration of a vaccine
  • together: vaccination, vaccine shot, vaccine administration

These are both common formal nouns.

Japanese often omits information that is understood from context.

So this sentence does not explicitly say whose health checkup or vaccination it is. Depending on context, it could mean:

• My health checkup is over, but my vaccination is not yet finished
• The employee’s health checkup is over, but the vaccination is not yet finished
• The health checkup has been completed, but the vaccination has not yet been completed

Japanese frequently leaves subjects and possessors unstated when they are obvious or not important.

Yes, it could.

• 健康診断は終わったものの、ワクチン接種はまだ終わっていない。

This is also natural.

The difference is small:

• が in the original sounds a bit more like stating the fact that the health checkup finished
• は would make 健康診断 more clearly the topic, and might strengthen the contrast with ワクチン接種は

So both are possible, but the original is perfectly natural.

The sentence presents a contrast between two related procedures:

• one has been completed
• the other has not yet been completed

Because of ものの, it can sound slightly like:

• Even though the health checkup is over, the vaccination still isn’t done
• The health checkup is finished; however, the vaccination is not yet finished

Depending on context, it may carry a mild sense of incompleteness, inconvenience, or unfinished business.