Korosuke is a Japanese narrator and voice actor, widely recognized for their long-standing contribution to educational and folk tale programming for children. Their career is most prominently defined by their narration work on the long-running television program Nihon Mukashi Banashi, a series dedicated to animating and telling traditional Japanese folk tales. Within this series, Korosuke has been the voice behind numerous iconic characters, including the role of the hero Momotarō in the story Momotarō, which is part of the Nihon Omoshiro Mukashi Banashi sub-series. This role is a prime example of their work in bringing classic Japanese folklore to life for a young audience.

Beyond character roles, Korosuke is perhaps even more renowned for their distinctive and warm storytelling narration. Their voice has been a staple in Japanese children's entertainment for decades, creating a sense of comfort and familiarity for generations of viewers. This has led to a significant body of work in similar genres, including narration for other educational programs, animated adaptations of fairy tales from around the world, and various children's videos and DVDs.

Due to the nature of their work, which is often tied to long-running, single programs or specific educational media productions, Korosuke's career is marked by a deep and consistent collaboration with the production teams and studios behind Nihon Mukashi Banashi. This long-term association has made their voice synonymous with the program itself. Their most notable achievement is the lasting cultural impact of their narration, having helped preserve and transmit Japan's oral storytelling traditions through the medium of television and video for over four decades.