Kanji are ideograms, that is, symbols used to represent things or ideas.
Kanji were developed in China in the 14th century BC, and then introduced to Japan at about 4th century AD.
Once in Japan, kanji were used to write Japanese phonetically, without regard to the original character’s meanings in Chinese language. That’s why kanji may coincide in Chinese and Japanese, but don’t necessarily mean the same thing.
Kanji are generally combined in groups, to form single more complex concepts.
Let’s see how this works, using the character that means “woman” as an example. Criteria that have been used to create these combinations seem very interesting to me, as they expose the inner thought of human mind… and show us that we are not so far away from ancient Japanese people.
The information above and the pictures below have been taken from the book “Illustrated Japanese Characters”, printed in Japan by JTB Publishing, Inc.

