This Shape Is My Heart, by Reina Sasaki — Book Review

“This Shape Is My Heart” by Reina Sasaki is a richly nuanced coming-of-age story that explores the dynamics of teenage friendship, the meaning of self-expression and the fragile nature of trust. Set in a Japanese town in the late 1980s, the story follows Kotori Miyama, a thoughtful and kind fourteen-year-old, her bold best friend Airi Tohno, and a mysterious newcomer woman named Sae Takei, whose arrival disrupts the balance of their close-knit relationship.

This novel will likely appeal most to people who are interested in Japanese culture and who enjoy manga. The alternating perspectives of the central characters offer a compelling reading experience, allowing readers to intimately experience their distinct personalities. Kotori’s love for origami becomes a central metaphor in the narrative (as seen in the title), reflecting how people shape their identities and relationships, imbuing even simple gestures with profound meaning. The relationships portrayed are richly layered, capturing the fragility of trust and the vulnerability of adolescence.

The bond between Kotori and Airi runs deep in the book, though their personalities often pull them in different directions – Airi’s fierce protectiveness contrasting with Kotori’s quiet, thoughtful nature. Sae’s arrival stirs up trouble, as Airi can barely hide her unease, fearing she might lose her special connection with Kotori. Meanwhile, Kotori finds herself caught between worlds – drawn to Sae’s elegant manner and intriguing past, yet deeply aware of Airi’s growing concern.

Sasaki’s writing is remarkable for its evocative imagery and cultural depth. The setting brims with detail, from the traditions of rural life to the nostalgic elements of late 1980s Japan, such as cassette players and handwritten New Year’s postcards. The descriptions of festivals, rituals, and everyday moments create an immersive experience while highlighting universal aspects of growing up. The dynamic between Kotori and Airi, and their reactions to Sae, feels real and full of emotion, with dialogue that keeps you hooked throughout. Sasaki skilfully portrays the push and pull of teenage friendships—how loyalty and jealousy often coexist—and the uncertainty that comes with meeting someone who challenges your worldview.

While some introspective moments may feel a bit lengthy for some readers, they also significantly enhance the story’s emotional depth. Sasaki masterfully infuses even the quietest scenes with tension and warmth, creating a narrative that shines with humanity. The accompanying illustrations, though likely to appeal to young people more than adults, are skillfully rendered and add another layer to the storytelling.

This is a tender and thought-provoking novel that will resonate with readers who appreciate character-heavy stories of personal growth, the complexities of friendship and the often ignored beauty of everyday life. Although it might feel a bit long for some, its easy-to-read style ensures the story flies by most of the time. Sasaki invites us to reflect on how we share our hearts with others and what it means to truly see and be seen.