Ryūzō Hasuike is a Japanese voice actor born on February 12, 1964, in Hiroshima Prefecture, Japan. He is affiliated with the talent management agency Pro-Baobab.

Hasuike has built a career primarily through supporting roles in anime series and original net animations. He is perhaps best known for voicing the character Sen Hatsumi in the martial arts franchise Kengan Ashura. He portrayed Sen Hatsumi in the 2019 original net animation Kengan Ashura and later reprised this role for the crossover film Baki Hanma vs. Kengan Ashura.

His other voice credits include the role of Jo Kaiō in the long-running Baki series and the character Uhta the Orangutan in The Animal Conference on the Environment. In addition to these performances, Hasuike has appeared in numerous other anime productions, including the television series Ring ni Kakero, Soul Eater, and Detective Conan, as well as in films such as Kuroshitsuji: Book of the Atlantic and originating from a butterfly. His voice acting work spans a variety of genres from action and martial arts to mystery and supernatural fiction.