That's really Chinese words. Ha ha.
China is the teacher of Japan on culture and words long time ago. In Tang Dynasty, Japan sent some people to China to learn culture and words(I mean words for writing). At last, Japan use some Chinese words in their own language and some Japanese words is write as half Chinese words.(I don't know the currect sentence to express this meaning, if you can understand what I said, could you tell me the currect sentence? Thank you.)
At last, thank you for your replies.
Any help and reply will be appreciated. Thank you.