Japanese Honorifics

San - the most common honorific and is a title of respect. It is used for the surnames or given names of both males and females.

Kun - an informal honorific primarily used towards males (it is still used towards females, but rarely). It is used by persons of senior status in addressing those of junior status, by males of roughly the same age and status when addressing each other, and by anyone in addressing male children. It can also be used by females when addressing a male that they are emotionally attached to.

Chan - an informal version of san used to address children and female family members. It may also be used towards animals, lovers, intimate friends, and people whom one has known since childhood.

Senpai - used to address senior colleagues or mentor figures

Kōhai - used to refer to juniors

Sensei - used to refer to or address teachers, practitioners of a profession such as doctors and lawyers, politicians, and other authority figures.

Sama - the formal version of san. This honorific is used primarily in addressing persons much higher in rank than oneself and in commercial and business settings to address and refer to customers.

Source: Wikipedia