Is there a Japanese term to express the concept of "Comfort Zone"?


According to Wikipedia, it would be "舒适区" IN CHINESE- I would like to know if
this is valid and recognizable in Japanese, too, or if there are more
specific/nuanced terms to convey the same idea in Japanese.

Some examples of the meaning I am looking for, taken from [Google
definition](https://www.google.it/webhp?sourceid=chrome-
instant&ion=1&espv=2&ie=UTF-8#q=comfort%20zone%20definition) of the term:

_Comfort zone_ - noun

  * a situation where one feels safe or at ease. _"the trip is an attempt to take the students out of their comfort zone"_
  * a settled method of working that requires little effort and yields only barely acceptable results. _"if you stay within your comfort zone you will never improve"_

Finally, Google Translate gives you "安全地帯" for it.




舒适区 is totally unfamiliar to Japanese. I don't even know what the first two
kanjis are.

Anyway, if you want to emphasize the negative aspect of "comfort zone" and
want to say "the place you can't stay forever", a good word for both of your
examples is 「ぬるま湯【ゆ】」 (literally "tepid water").

ぬるま湯につかる = stay safe, avoid challenge, lack vitality

> The trip is an attempt to take the students out of their comfort zone.  
>  この旅行は、生徒達をぬるま湯から抜け出させるための試みです。
>
> If you stay within your comfort zone you will never improve  
>  ぬるま湯につかったままでは絶対に成長しないぞ。

**EDIT:**

安全地帯【あんぜんちたい】, or frequently abbreviated as
[安地【あんち】](http://dic.nicovideo.jp/a/%E5%AE%89%E5%9C%B0) by gamers, is more
like "safety zone", where you are _physically_ safe.

If you don't like metaphorical phrases, "居心地【いごこち】のいい場所【ばしょ】" is more neutral
and usable both in the positive and negative ways. Ex:
「居心地のいい場所にずっといても成長しない」「この部屋は居心地がいい」「居心地のいい場所を離れよう」




舒适区 is totally unfamiliar to Japanese. I don't even know what the first two
kanjis are.

Anyway, if you want to emphasize the negative aspect of "comfort zone" and
want to say "the place you can't stay forever", a good word for both of your
examples is 「ぬるま湯【ゆ】」 (literally "tepid water").

ぬるま湯につかる = stay safe, avoid challenge, lack vitality

> The trip is an attempt to take the students out of their comfort zone.  
>  この旅行は、生徒達をぬるま湯から抜け出させるための試みです。
>
> If you stay within your comfort zone you will never improve  
>  ぬるま湯につかったままでは絶対に成長しないぞ。

**EDIT:**

安全地帯【あんぜんちたい】, or frequently abbreviated as
[安地【あんち】](http://dic.nicovideo.jp/a/%E5%AE%89%E5%9C%B0) by gamers, is more
like "safety zone", where you are _physically_ safe.

If you don't like metaphorical phrases, "居心地【いごこち】のいい場所【ばしょ】" is more neutral
and usable both in the positive and negative ways. Ex:
「居心地のいい場所にずっといても成長しない」「この部屋は居心地がいい」「居心地のいい場所を離れよう」

