Naruto was fighting 6 tailed beasts. He recieved chakras only from them. Counting Kurama too, he should have parts of the chakra of 7 bijuus in him. Shukaku, the One Tail, wasn't fighting them. (His last Jinchuuriki is still alive and wasn't revived by Tobi or Kabuto). The last time Naruto met Shukaku was in the pre-Shippuden fight. How did Naruto get his chakra? The ten tails clearly saw 8 bijuu's chakra portions in Naruto. Shukaku's face is shown there too. When and how did that happen?