After graduating from the Faculty of Education at Gunma University, Tomohiro Hoshino became a junior high school teacher. However, during his club activities, he suffered a cervical spine injury that resulted in losing limb mobility. While hospitalized and recovering at Gunma University Hospital, he began writing poems and creating art by holding a brush in his mouth, inspired by advice from nursing students. Subsequently, his poetry and artworks were serialized in magazines and newspapers, and he had nationwide "Flower Poetry and Art Exhibitions" that moved many people. He also held such exhibitions in New York, Honolulu, Los Angeles, and Warsaw. In 1991, the Tomihiro Art Museum was established in his hometown, and 2005, the New Tomihiro Art Museum was opened, attracting over 6.5 million visitors by 2014, evoking great inspiration.

    In 2006, he was honored as an Honorary Citizen of Gunma Prefecture, and in 2011, he received the Gunma University Special Honor Award, becoming the first recipient of this prestigious award. The award aims to recognize individuals, whether students or faculty members, who have made significant achievements in academic, cultural, and social contributions, bringing pride to the university.

    In 2012, Tomihiro Hoshino donated 45 pieces of his poetry and art to Gunma University. Furthermore, at the affiliated hospital of the medical school, a "Tomihiro Hoshino Flower Poetry and Art Corner" was established, where seasonal works are exhibited. That improves the healing environment and fosters individuals with enriched sensitivity among patients, visitors, general citizens, students, and faculty members. Additionally, the hallways are adorned with printed reproductions of artworks created by Tomihiro Hoshino during his recovery, creating a cozy atmosphere.