This memorial volume honors the life and work of Akito Arima (1930–2020), a distinguished physicist and educator who made significant contributions to nuclear physics and beyond. Through a series of heartfelt essays, personal recollections, and scientific papers, this book reflects Arima's profound influence on the field and his legacy in shaping global scientific discourse. Arima is best known for his development of the Interacting Boson Model and his pioneering work on nuclear structure,...