Saying that something was somewhere "after all" or "all along" expresses that it was some place expected that you perhaps overlooked. It also expresses that you felt some stress or frustration at losing it or finding it in a predictable place, for example: "My door keys were in the door all along!"
Saying that something was right under your nose should not be taken literally. This just means that an item or a fact was closer to you than you originally thought, for example, "The answer was right under my nose!"
"something was somewhere after all / all along"（［何々］は［どこどこに］結局／ずっとあった）は、それが思っていた場所にずっとあったことを表します。
これは、それをなくしたことや思っていた場所で見つけたことに対するイライラやストレスを表します。
例：
"My door keys were in the door all along!"
ドアの鍵が最初からドアにかかっていた。
"right under my nose"は、文字通りにとらない方がいいです。これは、物や事実がもともと思っていたよりも近くにあったことを表します。
例：
"The answer was right under my nose!"
答えは目先にあった。
At times, we may misplace a certain object such as a pen.
If we end up finding that pen in our pencil case, there may be a few different expressions we can use such as:
1) It was in my pencil case!
2) I found it in my pencil case.
3) It was there all along in my pencil case!
時々、ペンなどをどこかに置き忘れることがあるかもしれません。
もしそのペンが結局筆箱の中にあったら、いくつかの表現が使えます。例えば：
1) It was in my pencil case!
筆箱の中にあった！
2) I found it in my pencil case.
筆箱の中にあった！
3) It was there all along in my pencil case!
最初から筆箱の中にあった！
The pen I mislaid was in my pencil case all the time!
I just found my lost pen - in the pencil case!
When you couldn't find your pen - but then found it, (it had been in your pencil case).... you want to say that it was in your pencil case. Any of the above suggestions does just that.
We all know how frustrating it is when you can't find your pen!
To explain that your pen was in your pencil case while you were searching for it, you can say that it was there 'all along' to show that you had been looking in other places when your pencil case should have been the first place to check.
"I looked everywhere for my pen only to find it was in my pencil case all along, what a waste of my time!"
ペンが見つからないと本当にイライラしますね。
いろいろな所を探したものの結局「最初から」ペンが筆箱の中にあったなら、これは 'all along'（最初からずっと）で表すことができます。
"I looked everywhere for my pen only to find it was in my pencil case all along, what a waste of my time!"
（ペンをなくしてそこら中探したけど結局筆箱の中にありました。すごい時間の無駄でした）
日本 
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イギリス 
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