Chihiro Kujou is a secondary character in the anime Koi wa Ameagari no You ni, serving as a pivotal figure who provides insight into the protagonist Masami Kondou's past. He is a successful and fairly well-known novelist, a career that has brought him a degree of public recognition, including appearances on television. In terms of appearance, Chihiro is a man with long, flowing, wavy white or light-colored hair that he often wears in a ponytail, complemented by a pair of glasses. He resides in a high-rise apartment, specifically unit 1208, a setting that reflects his established and comfortable lifestyle as an accomplished author.

His most significant relationship is with Masami Kondou, whom he has known since their time together as students at Waseda University. The two are close friends, though they had lost contact for a period of ten years before reconnecting. Since resuming their friendship, Chihiro occasionally visits Kondou, and together they reminisce about their shared past. People in Kondou's daily life, such as his colleagues at the Garden family restaurant, are initially unaware of his friendship with the famous writer, a fact that is later revealed when Chihiro visits the restaurant.

Within the story, Chihiro functions as a confidant and a mirror for Kondou, representing a life path not taken. Their conversations often touch on their youthful ambitions and the compromises of adulthood, and Kondou's casual remarks can sometimes lead Chihiro to reconsider his own perspectives. Notably, when he learns that Akira Tachibana, the young girl who concerns Kondou, is a seventeen-year-old high school student, he is genuinely astonished. This reaction is echoed when he later meets another promising young writer named Sui Machida, whose equally young age also troubles him, highlighting his awareness of the gap in experience and maturity between himself as an established adult and these budding youths. Through these interactions, Chihiro's character development is subtly shown; his initial surprise evolves into a thoughtful observation of Kondou's unique situation, demonstrating his role as an observer whose understanding of his friend deepens. His primary ability is his success as a novelist, a talent that sets him apart from Kondou and serves as a constant, silent point of comparison between the two old friends.