Keep in mind that this is 3.0 stats. 3.5 has an entirely different kusari-gama (DMG p.144f) that explicitely is not a double-weapon, so the old version of the weapon might not even exist in your game depending on how strict the DM is on 3.5 content overriding 3.0 content.
As for weapon finesse, yes, it would apply to attacks with either end of the weapon.