Japanese Honorific

San

    San is the most commonplace honorific, and is a title of respect typically used between equals of any age. almost universally added to a person's name, in both formal and informal contexts.

Chan 

    Chan is used (but is not limited) to babies, young children, grandparents and teenage girls. It may also be used towards cute animals, lovers, close friends, any youthful woman, or between friends. It can be used for males in some circumstances, but in general this use is rather condescending or intimate. Using chan with a superior's name is considered to be condescending and rude.

Bō

   Bō is another diminutive that expresses endearment. Like "chan", it is used for babies and young children, but is exclusively used for boys instead of girls.

Kun

    Kun is used by persons of senior status in addressing or referring to those of junior status, or by anyone when addressing or referring to male children or male teenagers, or among male friends.

Sama

    Sama is a markedly more respectful version of san. It is used mainly to refer to people much higher in rank than oneself, toward one's customers, and sometimes toward people one greatly admires.

Senpai

    Senpai is used to address or refer to one's senior colleagues in a school, a dojo, sports club.

Sensei

    Sensei is used to refer to or address teachers, doctors, politicians, lawyers, and other authority figures.

Shi

    Shi is used in formal writing, and sometimes in very formal speech, for referring to a person who is unfamiliar to the speaker, typically a person known through publications whom the speaker has never actually met.