ninja ranking: http://www.narutofob.com/naruto-ninja-ranks.html the best website to understand the ranking
chakra: a source of energy that you can control to do ninjustu genjustu and maybe tiejustu.
bakugan: an other eye that should only be in the hyuga. the eyes have the ability to see in an almost 360 degree angle around him and see there chakra points/flow
sharingan: a special eye that only the uchiha clan SHOULD have. The eyes have the ability to copy abilities that don't run in there blood like the hyuga clan's bakugan and use genjustu in extreme ways
hokage: strongest ninja in the whole village and best choosen to protect the village
ninjustu: using chakra to do different type of specials like control elements or use special eyes...ect
