Hunting is a sport favored by warriors, even though game is rarely if ever consumed by members of the samurai caste. The types of game hunted in Rokugan can be quite dangerous, however, and as a result there is a great deal of survival knowledge associated with the sport of hunting. Hunting is never done with a samurai's daisho; it is typically performed either with bow and arrow or, in cases of particularly large game, spears.
The Survival Emphasis allows you to forage for sustenance and shelter in the wilderness, with a TN varying upon the severity of the conditions (the forest is simpler than the mountains, which are simpler than the desert, etc.). The Tracking Emphasis allows you to locate and follow the tracks of prey through rural environments, although repeated Skill Rolls are necessary for longer trails. Trailblazing allows you to forge a trail through the wilderness that others can follow, making better time and requiring less work in order to follow.
Note: Mastery Abilites rank 3 and 7 are house rules and are not part of the standard 4th edition ruleset.