Ch. 21A theory for upgrading the Rasengan
Yuzuru discussed summoning contracts and revealed his theory for upgrading Jiraiya’s Rasengan into a technique beyond S-rank. The chapter ended with Jiraiya realizing that senjutsu chakra could solve the upgraded Rasengan’s main drawback.
- Tsunade joined Yuzuru, Kurenai, and Orochimaru for a meal and agreed to take Yuzuru to sign a contract with Shikkotsu Forest.
- Yuzuru asked about other sage lands and said he wanted a summoning beast contract, so Tsunade invited him to her house.
- Tsunade and Orochimaru examined Yuzuru and remarked on his chakra and unusual appetite.
- Jiraiya asked Yuzuru to teach him the Rasengan, and Yuzuru revealed that it could be upgraded into a technique beyond S-rank with Sage Mode.
- Yuzuru explained that the upgraded Rasengan’s power could injure its user and that ordinary chakra would dissipate if thrown.
- Jiraiya realized senjutsu chakra could overcome that problem because natural energy was everywhere.