What anime features the theme song "Blue Bird," which is famous for its uplifting melody and association with the series' themes of freedom and adventure?

The anime Naruto Shippuden features the theme song “Blue Bird” by Ikimono Gakari. This song is celebrated for its uplifting melody and lyrics that resonate with themes of freedom and adventure, aligning with the series’ focus on the journey and growth of its characters. “Blue Bird” serves as the opening theme for the show’s fourth season and has become one of the most iconic and beloved songs associated with Naruto Shippuden, enhancing the emotional depth and excitement of the series.