Monkey Summoning - Sign the contract with Hiruzen Sarutobi.
Slug Summoning - Sign the contract with Tsunade.
Toad Summoning - Sign the contract with Jiraiya.
Dog Summoning - Sign the contract with Kakashi Hatake.
Turtle Summoning - Sign the contract with Maito Gai.
Eight Inner Gates - Must be taught to by Maito Gai.