The model of Kizaru's face is the Japanese actor, Kunie Tanaka. Along with that, Kizaru's clothes, real name and birthday, Borsalino, are apparently based on a movie character that Kunie Tanaka played in his youth. The character, Borsalino, from the old Japanese film Truck Yarō (トラック野郎), wore a suit and shades similar to Kizaru's design.
The design for Aokiji's face is based on the late actor Yusaku Matsuda. The character that the actor played in the TV series and movie "Detective Story" (Tantei Monogatari) even had a similar hairstyle, clothing and wore the same sleep mask design. Aokiji's birthday is even based upon Matsuda's.
http://2.bp.blog spot.com/_hLY9DmXXlH4/TMh73-wU8mI/AAAAAAAACKI/aHmecFe3jJE/s1600/img_1222818093906.jpg
The way Akainu's character design is drawn resembles the famous Japanese actor, Bunta Sugawara. Akainu's real name, Sakazuki is apparently based on the three movies of Bunta Sugawara with "Sakazuki" in the title. Even Akainu's birthday is based on Sugawara's
Edit: taken from the one piece wikia
According to other people the blind swordsman is based on Zatoichi which is Shintaro Katsu most famous role
http://2.bp.blog spot.com/_pZ29ZOXcK3Q/SkRFc8K0QTI/AAAAAAAAAIg/s7NW57RaPdo/s320/ShintaroKatsu-ZatoichiChikenuriKaido.jpg
This post was edited by LyZeR on Mar 6 2013 05:34pm