According to [this answer](https://chinese.stackexchange.com/a/22712/6228):

> Almost all Japanese characters (in my experience >99%) are exist in Chinese.
> Few are changed a little, like 宮 and 宫. As a Chinese, I have no difficulty
> in recognizing Japanese characters.

Now, I wonder which character is what was invented in Japan, or maybe imported
from Korea but not originally from China, if any.

Is there any research regarding this area or is there such compiled list?
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kanji loanwords chinese
Is there a list of Japanese characters that don't have equivalent roots in Chinese?
This kind of characters is called 国字 or 和製漢字. So through a search of these
terms on the internet, you can find the [Wikipedia
page](https://ja.wikipedia.org/wiki/%E5%92%8C%E8%A3%BD%E6%BC%A2%E5%AD%97) the
introduces these character, which also contains a simple list.

And on that Wikipedia page, there is also a link to
[和製漢字の辞典2014](http://ksbookshelf.com/nozomu-oohara/WaseikanjiJiten/), which is
an online dictionary for the Japanese made characters.
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answer