Junpei Morita is a Japanese actor and voice actor born on August 1, 1954, in Fukuoka Prefecture. He is affiliated with the talent agency Mausu Promotion. Morita began his entertainment career in 1977 as a stage and television actor, gaining long-running recognition for his role as a teacher in the television drama series Kinpachi-sensei, which he played for nearly three decades. He expanded his career to focus on voice acting in 1998.

As a voice artist, Morita has built an extensive and varied portfolio in anime, animation dubbing, and video games. In anime, his roles include Nagato in Naruto: Shippuden, Shōzō Tanuma in Kaguya-sama: Love Is War, and the second voice actor for the school principal in Crayon Shin-chan. He has also appeared in series such as Wild Arms: Twilight Venom as Kiel Aronnax, Mujin Wakusei Survive as Brindo, and Kōkaku no Pandora as Buer. His film work includes roles in Harmony as Nuaza Kirie and in Mazinger Z: Infinity as Prime Minister Yumi. He is also a familiar voice in the Super Sentai and tokusatsu genres, frequently voicing villainous characters.

Beyond anime, Morita is highly regarded as the primary Japanese dubbing voice for several prominent Western actors, including Hugh Grant, Colin Firth, and Matthew McConaughey, providing the Japanese-language track for many of their films. His voice work also extends to animated films from major studios and video game franchises such as Naruto, Final Fantasy, and Assassin's Creed.

Throughout his career, Morita has balanced performance with education, serving as a lecturer in performing arts at music universities. His sustained presence across television drama, stage, voice acting, and dubbing for over four decades has established him as a respected and influential figure in the Japanese entertainment industry.