in the novel the world of eden is divided into 4 continents
northern continent
southern continent
eastern continent
western continent
there is central island's but that is for another time
power system for hunters
rank system
G"F"E"D"C"B"A"S"SS"SSS
every rank has three sub ranks like
A-"A"A+
( the above ranks will also be applicable other professions such as alchemist, blacksmith etc
)