EDIT Kanbun is a Japanese term and means »Han text« (Chinese text). It is a writing system that uses Chinese characters to write for Japanese readers. Before the advent of the modern Japanes writing systems and syllabaries it was used in Japan to write official documents. It is still in use today, mainly to annotate Chinese literature, and is a required subject in high school.
Since Kanbun is actually Chinese there are certain rules for its use and some special characters, a set of marks known as kaeriten (返り点), »return points«.

 jsw