I am sure this will come in handy. If you just know the title -san, well, let me assure you that there is more with usage to address different types of people.
* san: (for example Sato-san)
This is the most neutral and famous title, and can be used in most situations. Only in formal situations, san may not be polite enough.
* sama: (for example Sato-sama)
This is a more polite form of san, commonly used in formal situations and letters, but too polite in a casual context.
* kun: (for example Yusuke-kun)
This is an informal title used for boys and men that are younger than yourself.
* chan: (for example Megumi-chan)
This is an informal title used for young children and very close friends or family members.
* sensei: (for example Sato-sensei)
This is a title used for teachers, doctors and other people with a higher education and from whom you receive a service or instructions.
If you call your sushi teacher, -san, it may not be quite appropriate. A sensei or -sama would be better suited. Bet you didn’t know that ;)