·週刊誌· - weekly magazine
Ja (aber ich habe für eine lange Zeit Deutsche nicht gesprochen) und ja, I do love mathematics. The number ‘e’ is also called both Napier’s number and Euler’s number (I guess this is where ‘e’ comes from).
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心理学 (しんりがく) = psychology
Haha, that’s quite a coincidence, as German happens to be my first language!
I think one of the most interesting fact about e is that it appears in so many branches of Mathmatics, even if they don’t seem to be related at all! And then there are multiple ways to define e (e.g. with a series or a limit).
And there is a pretty interesting fact about pi, too! I’ve learned and noticed that whenever pi shows up somewhere, there is pretty much always some way to find a hidden circle where the pi comes from. I don’t know if there is an exception to that, but I haven’t found one yet 
Apart from these, some other very interesting numbers that I can think of right now are phi (aka golden ratio), 42 (cuz funny lol), i (I love working with complex numbers 
), and the omega constant (because it is defined via one of my favorite functions when it comes to solving equations 
).
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区別 - distinction
Yes, I saw it in another topic and thought it would be nice to answer you in your own language.
Indeed, those ever appearing constants are something to wonder about. I like this expression where three of them show up together in such a succinct way:
eπi +1 = 0
In fact, the next ‘some number’ I was thinking of using as reply was to be φ, which in Japanese is ‘·黄金比·’, literally ‘golden ratio’, 比 also being used for ratio.
EDIT: I was wondering why 42, now I remember: this is the answer to the Ultimate Question. 
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付け睫毛 ー False Eyelashes
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原子力時代 (げんしりょくじだい) = Atomic Power Era.
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イスタンブール - Istanbul
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留守番電話 (るすばんでんわ) - answering machine
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忘れ物 (わすれもの) = Forgotten Item.
You’ll hear this word used frequently when riding trains in Japan.
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ノンビリ ー At leisure
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·隣国· - neighbouring country
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車屋 (くるまや) = Auto Shop.
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休む (やすむ) = to rest
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胸搦み ( むながらみ) = collar
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Argh, I forgot, no verbs! Can I change to 休み?
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If no one had replied, but it’s too late now. No worries, no one dies when the game resets.
尻取り (しりとり) = Take from the rear (or is it butt?) 
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Aight, a new round then, I guess 
リンゴ (りんご) = apple
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ご苦労様 (ごくろうさま) = Thanks for your efforts!
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招き猫
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言葉（ことば）language
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万有引力 (ばんゆういんりょく) = Newton’s Law of Gravity.
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