There is a huge overlap with Kanji, but I think chinese (characters) should be refered as 'Hanzi'or not? The page doesnt load too well on my mobile so not 100% sure what is on the page.
Or you meant japanese kanji (adopted chinese characters)?
"Kanji" is often translated into English as "Chinese character", so the two terms tend to be used interchangeably even when someone is referring to text written in Japanese.
In English, it would be most appropriate to call Chinese language characters hanzi, and Japanese language characters kanji, but this is an English distinction, not one in the native tongues that use these characters.
As the author of these drawings is Japanese, the correct term would be “kanji”, but the word “kanji” literally means “Chinese character”.