Ranks and titles:
Kohai Junior student
Sempai Senior student
Sensei Instructor
Shihan A senior teacher, properly used within the school only, when outside, use sensei
Kyu Student grade, from 10 up to 1, the highest: jukyu, kukyu, hachikyu, nanakyu, rokyu , gokyu , yonkyu , sankyu , nikkyu , ikkyu
Dan More advanced grades, from 1 to 10: shodan , nidan , sandan , yondan , godan , rokudan , nanadan , hachidan , kudan , judan
Yudansha Members with dan grades
Mudansha Members with kyu grades
Hanshi Highest title from ZNKR, must be 55 or older and 8 dan.
Kyoshi Middle title from ZNKR, must be 7th dan.
Renshi Title bestowed from ZNKR in addition to Dan ranks.
Soke Head of style (actually head of family, unifier of gods and lineage)
Doshu Head of the way (currently Moriteru Ueshiba, grandson of O Sensei)
Kaicho "Owner" of school (organization) eg. Sei Do Kai
Kancho "Owner" of school (building, hall) eg. Yugen Kan
Dojo-cho "Leader" of a dojo
O Sensei Great Teacher (Ueshiba, Morihei)