In Haruki Murakami's "Kafka on the Shore," a character observes that another's shadow seems incomplete, casting a lighter version than that of typical individuals. This moment suggests that the person's essence or identity is somehow diminished, and it offers a metaphor for a deeper search for self. The notion of the shadow reflects one's inner life and struggles, prompting the individual to explore beyond their current situations.

The advice to abandon mundane pursuits, like searching for lost cats, in favor of seeking one's missing shadow implies a journey toward self-discovery and fulfillment. This quest symbolizes the need to confront one's fears and insecurities, ultimately leading to a wholer and richer existence. Murakami emphasizes that understanding oneself is crucial, and the search for completeness is a fundamental part of the human experience.