What Ryuchi Cave is for
Ryuchi Cave is the snake-associated location where Kabuto learns senjutsu from the White Snake Sage. It is named alongside Mount Myoboku and Shikkotsu Forest. Orochimaru reached it while investigating Jugo’s abilities. That is a discovery story, not evidence that Jugo founded the cave or taught its sage.
The cave’s role is distinct from Naruto’s toad training. For the shared energy concepts, see the Sage Mode guide. The focus here is the snake teacher, the different outcomes for Orochimaru and Kabuto, and which details come from the anime.
The White Snake Sage: teacher, test, and legend
Kabuto’s instruction establishes the White Snake Sage as a teacher. Official databook material describes her using her fangs to inject applicants with natural energy, and reports a legend that she devours applicants whose bodies cannot withstand the power. Keep that databook account and the attributed legend separate from claims about ordinary venom or poison.
Her role as a teacher does not turn every later story set at the cave into a record of what happened during Kabuto’s training. The source of a detail matters as much as the location’s name.
Kabuto and Orochimaru are different cases
Orochimaru could mould senjutsu chakra but lacked a body capable of supporting Sage Mode. That limitation is part of his published portrayal. It does not establish a depicted failed bite test or a poisoning incident. Adding such a scene would turn an explanation of his limitation into an invented event.
Kabuto receives the White Snake Sage’s instruction and enters Sage Mode. His modifications include Jugo’s passive natural-energy absorption, helping him gather while moving. That borrowed ability is discussed in more detail in Jugo’s clan and cursed seals. Instruction and bodily modification are separate parts of Kabuto’s case.
Kabuto describes his transformation as becoming a dragon. That is his description of his achievement, not evidence of a separate dragon sage school or an additional training location.
Inorganic Reincarnation
Sage Art: Inorganic Reincarnation, or Senpo: Muki Tensei, is called Inorganic Animation in the anime. Kabuto uses natural energy to animate nonliving surroundings against Itachi and Sasuke. That explains why the terrain becomes part of his attack. It does not establish unrestricted matter transmutation, and the battle setting should not automatically be identified as Ryuchi Cave just because Kabuto trained there.
Which trials come from the anime
The official synopsis of Boruto anime episode 75, The Trials of Ryuchi Cave, describes Boruto and his companions facing trials before meeting the White Snake Sage. Those scenes belong to the anime’s presentation of the cave.
They should be labelled accordingly when discussing its training. The episode is not evidence that Naruto’s manga depicts Kabuto taking that same series of tests. Keeping that boundary preserves the anime detail without inserting it into his manga backstory.