You can revive any Six Samurai monster, even Grandmaster of the Six Samurai. Six Samurais need other Six Samurai monsters on the field to activate their effects. You can special summon a Six Samurai monster on the field to use their effects.
Special summon Kizaru from your graveyard and you get to search out another Six Samurai monster from your deck.
Reviving a Six Samurai monster from your graveyard can open for a lot of special summon plays. With at least one Six Samurai on the field you can special summon Grandmaster of the Six Samurai. Or if you now have 2 Six Samurai monsters on the field, you can special summon Great Shogun Shien. You can then use Cunning of the Six Samurai or Secret Skills of the Six Samurai to swap out your revived Six Samurai for a permanent Samurai on the field.