sono ken ha mada kimatte imasen.

件 means something like matter, issue, case, or item.

In その件, it refers to that matter or that issue—usually something already mentioned in the conversation.

A few examples of how 件 is used:

• その件 = that matter
• この件 = this matter
• 先日の件 = the matter from the other day

It is a fairly common and useful word in business, formal conversation, and everyday discussions when talking about a specific topic or problem.

その means that, and it points to something connected to the listener or something already being discussed.

Japanese has three related words:

• この = this (near the speaker)
• その = that (near the listener / already mentioned)
• あの = that over there (away from both)

So その件 usually means:

• that matter we’re talking about
• that issue you mentioned
• that particular case

In conversation, その often works like the in English when referring back to something already known from context.

は marks the topic of the sentence.

So その件は means:

• As for that matter, ...
• Regarding that issue, ...

The rest of the sentence tells you something about that topic:

• その件は = as for that matter
• まだ決まっていません = it has not been decided yet

This is a very common Japanese pattern:

• Aは Bです
• As for A, it is B

Here, は does not mark the subject in the same way English does. It introduces what the sentence is about.

まだ means still or yet, depending on whether the sentence is positive or negative.

In a negative sentence like this one, it usually means not yet:

• まだ決まっていません = has not been decided yet

Compare:

• まだです = not yet
• まだ食べていません = I haven’t eaten yet
• まだ雨が降っています = It is still raining

So in this sentence, まだ shows that the decision may happen later, but it has not happened so far.

決まっていません comes from the verb 決まる, which means to be decided, to be निर्धारित/fixed, or to be settled.

Breakdown:

• 決まる = dictionary form
• 決まっている = is in a decided state / has been decided
• 決まっていません = is not in a decided state / has not been decided

So this is:

• て-form
  • います
• in the negative polite form

Important point: with many verbs, 〜ている can describe a resulting state, not just an action in progress.

So 決まっている often means:

• has been decided
• is settled
• is fixed

And 決まっていない means:

• has not been decided
• is not settled yet

This is a very common learner question.

The difference is between:

• 決まる = something is decided / gets decided
  
  • intransitive
• 決める = someone decides something
  
  • transitive

So:

• その件はまだ決まっていません
  = That matter has not been decided yet.

• まだ決めていません
  = (Someone) has not decided it yet.

The sentence you were given focuses on the state of the matter itself, not on who is doing the deciding.

That is why 決まる is more natural here.

No, 決まる is not grammatically passive.

It is an intransitive verb. That means it describes a change or state without directly taking an object.

Even though English often translates it with a passive expression:

• It has not been decided yet

Japanese is not using passive grammar here.

Compare:

• 予定が決まる = the schedule gets decided / is settled
• 予定を決める = decide the schedule

So the English translation may look passive, but the Japanese grammar here is simply intransitive.

Japanese often leaves out information that is obvious from context.

In this sentence, the topic その件は already tells us what the sentence is about:

• As for that matter...

There is no need to explicitly say who is deciding it unless that information matters.

Japanese frequently omits:

• the doer
• the subject
• the object

if the listener can understand them from context.

So the sentence feels natural and complete even without naming:

• who will decide it
• who is responsible
• what organization is involved

It sounds polite and neutral. It simply says that the matter is not settled yet.

Depending on context, it can imply:

• the decision is pending
• discussions are still ongoing
• nothing final has been determined
• you should wait a little longer

Because it uses the polite form いません, it is suitable in:

• business conversation
• customer service
• talking to someone you do not know well
• general polite speech

It is less direct than saying something like:

• まだ分かりません = We don’t know yet
• まだ決めていません = We haven’t decided yet

その件はまだ決まっていません sounds a bit more formal and objective.

Yes. Depending on context, 決まっていません can be translated in several natural ways:

• has not been decided yet
• is not decided yet
• is not settled yet
• hasn’t been finalized yet
• isn’t fixed yet

The best English wording depends on what その件 refers to:

• a plan
• a date
• a policy
• a price
• a result
• a schedule

So the core idea is that the matter has not reached a final decision.