ないとなると meaning in a sentence Context: The protagonist is searching for a girl in his house, and since his house is really big he has yet to find her. > I don't understand this sentence. =Until here =Not looking for; Not searching =If it's the case; If it comes to that =After that, the dojo or the storehouse. I don't understand why it's . > If I do not look until here, After that, the dojo or the storehouse. But it does not make sense, does it?

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In the phrase in this context,

> It is Person **A** who is (searching), and
>
> it is Person **B** who is (not there).

The above was your (only) mistake, but since it was a big one, it cost you the rest of the sentence.

One more thing. here means more like "to this degree", "as hard as this", etc. It does not really mean "until here".

My own fairly literal TL:

> "If we searched this hard and still couldn't find her, that would mean that the remaining possibility would be either the dojo or the storehouse."

Your understanding of is just fine. I just happened to use "that would mean" in my TL.