Originally Posted by Lelouch
only his DNA not his power. the makuton jutsu was only effective because of the crystal around naruto's neck given to him by tsunade, she never mentioned to him that the crystal also has the essences of the 1st hokages chakra. without that none factor yamato may have not been able to surpress the kyuubi.
Ineed, in episodes 68-69, naruto asks yamato if he can seal Soras kyuubi just like he did with him and yamato states that he cant because sora doesnt have the firsts necklace with him