Sempai (先輩 :せんぱい) is used to address or refer to one's senior colleagues (lower rank black belts 1st Dan-3rd Dan) in a dojo.
Sensei (先生 :せんせい) (literally meaning "former-born") is used to refer to or address teachers. Used for addressing your teacher and blackbelts 4th Dan and Above.
Renshi (錬士 : れんし): Polished Instructor. (Skilled person or expert teacher) Awarded to Godan (5th Dan) and above.
Shihan (師範 : しはん), means chief instructor; usually awarded at Nanadan (7 degree Blackbelt).
Kyōshi (教士 : きょうし) refers to an advanced teacher. (Senior Teacher/Expert). Awarded to 7th Dan and above.
Hanshi (範士 : はんし) refers to a senior expert considered a "teacher of teachers". This title is used for the top few instructors of that style, and is sometimes translated "Grand Master". Awarded to 8th Dan and above.
Sensei (先生 :せんせい) (literally meaning "former-born") is used to refer to or address teachers. Used for addressing your teacher and blackbelts 4th Dan and Above.
Renshi (錬士 : れんし): Polished Instructor. (Skilled person or expert teacher) Awarded to Godan (5th Dan) and above.
Shihan (師範 : しはん), means chief instructor; usually awarded at Nanadan (7 degree Blackbelt).
Kyōshi (教士 : きょうし) refers to an advanced teacher. (Senior Teacher/Expert). Awarded to 7th Dan and above.
Hanshi (範士 : はんし) refers to a senior expert considered a "teacher of teachers". This title is used for the top few instructors of that style, and is sometimes translated "Grand Master". Awarded to 8th Dan and above.