In each hidden village, missions are a daily things to each ninja. Clients often come to each village asking for the service of ninjas. These task could be from escorting duties or simply walking a dog. In return, the clients pay for the service to the village. Often, there are missions that are assigned by Kages that doesn't involve money, but rather as missions for the village or country. Each missions are broken down into difficulty with S being the most difficult and dangerous to D being the least.

S - Rank Missions

S Rank Missions are usually reserved for Hokage or very elite Jonin. They usually require that person to go to other villages.

Example: Hokage going to other Village for peace treaty.

A - Rank Missions

A Rank Missions are reserved only for Jonin. This mission requires combat mission and retrieval of scroll and battle with other Village.

Example: Retrieve a Missing-Ninja

B - Rank Missions

B Rank Mission are reserved only for Chunin. It somewhat requires a ninja to combat other ninjas of Hidden Villages. The missions require a ninja to go to other Countries.

Examples: Protecting someone and escorting someone which involves other ninja

C - Rank Missions

C Rank Mission are reserved for low Chunin and high level Genin, usually 2nd and long Genin. It reguire little combat, usually from robbers and mobs, but not ninjas. The missions require a ninja to go to other Countries.

Examples: Protecting someone, escorting a person to a place

D - Rank Missions

D Rank Missions are reserved for 1st year Genin and low level Genin. This missions is to build up a Ninja's experience and also training. They have to do with hard labor and manual labor. They work mostly in the community and within Leaf Village.

Examples: Walking and retrieving animals, picking up trash, help with farming/