Noted for his illustrious lineage, Miura hails from a family of esteemed celebrities, with his father, the renowned actor Tomokazu Miura, serving as a prominent influence on his early life. Moreover, his mother, the talented singer and actress Momoe Yamaguchi, has also played a significant role in shaping his artistic inclinations. As if this weren't enough, Miura's older brother, the multifaceted singer and actor Yutaro Miura, has further contributed to the rich cultural heritage that surrounds him. Furthermore, it is worth noting that Miura is also the cousin of the accomplished Kenta Itogi, a connection that has likely fostered a sense of camaraderie and shared passion for the arts.
In addition to his familial connections, Miura has also demonstrated a natural aptitude for swimming, having been trained as a lifeguard. This proficiency has likely instilled in him a sense of confidence and resilience, qualities that will undoubtedly serve him well in his future endeavors. Interestingly, it was only shortly before graduating from Juntendo University in Tokyo that Miura made the pivotal decision to pursue a career in acting, a choice that has led him to where he is today.