Board Thread:Theories and Speculation/@comment-1872728-20160229033316/@comment-27660682-20160302235342

What did black zetsu say? And personally I think kurama being in the wild for that long with the other tailed beasts is possible, considering only the uzumaki, uchiha, and hashirama had abilities to supress the bijuu and only a few other people can body tailed beasts. The bijuu would likely stomp most other ninja. Then it was hashirama who captured all the tailed beasts and distributed them to the villages. There is also the fact that bijuu take a while to respawn if they are killed and you dont always know where they are.