The reasons why Minato became a fourth Hokage:Yeah Minato does seem to only have "average" chakra, but it's what he did with it that made him a bad mofo. Yeah sure, there were several ninjas who had way more chakra, but they still couldn't beat him. Minato was smart, fast and quick to make decisions. He was fourth Hokage for a reason. Orochimaru probably had bigger chakra, but Minato was strong for other reason. He also knew a bunch of Fuuinjutsu (or whatever it was called, the sealing jutsu) that he learned from Kushina's mother. I think the reason that he only had average chakra was what made him a great shinobi, but HE MADE IT COUNT. He took his average chakra and still could beat anybody in the leaf village, except maybe Sage mode Jiraiya.
- Orochimaru had betrayed the third.
- Jiraiya was on his travels.
- Tsunade had left the village after Dan's death.
- Sarutobi was too old.