There was no official information on whether Jaff had been castrated in Fruit Candy, so there was no definite answer to this question. However, in the novel, Jaff was described as a young man with powerful martial arts and special abilities. His special abilities included the ability to obtain energy and heal wounds by eating fruits. Therefore, it could be speculated that Jaff might have obtained powerful martial arts and special abilities through some means without being castrated. It was important to note that the plot in the novel was fictional and could not be judged based on reality. Therefore, the answer to this question could only be based on the plot of the novel.