The film lacks LGBTQ+ characters or non-cisnormative identities. The plot centers on a platonic bond between a child and a mythical creature within conventional social structures.

The story follows a traditional male-centric coming-of-age perspective. It avoids overt misogyny but does not actively subvert established gender hierarchies or dynamics.

The setting and cast reflect a homogeneous rural Japanese demographic. While the Kappa represents a marginalized remnant of a lost culture, the human characters lack multi-ethnic variety.

The narrative prioritizes folklore and a nature-centric worldview over state or religious morality. It explores the tension between childhood innocence and institutional authority.

There are no prominent depictions of physical or neurodivergent disabilities. No such traits serve as central drivers for the characters or the plot.