Mutsumi Sasaki, born on July 20, 1961, in Hokkaido, is a celebrated Japanese actor and voice talent, recognized for his distinctive high baritone-tenor voice. His career gained significant traction with his role in the acclaimed animated feature "Summer Wars" (2009), where his performance captivated audiences and showcased his versatility. This film is not only a beloved entry in the anime genre but also a must-have for physical media collectors, particularly those who appreciate the evolution of Japanese animation in the late 2000s. Collectors often seek out Sasaki's work for its cultural impact and the nostalgia it evokes. His contributions extend beyond just "Summer Wars," as his voice has graced various other projects that highlight his unique talent. As a member of Engeki Shuudan En, Sasaki's involvement in theater further enriches his portfolio, making his films and voice roles highly sought after by enthusiasts who value the artistry behind physical media.