His only son, Bishop F.E.B. Idahosa, is now the president of BIU, founder and president of Big Ben's Children Hospital, vice-president of All Nations for Christ Bible Institute International, among other positions.
In October 1968, Idahosa officially inaugurated the Church of God Mission International, which had started out previously, as a "small prayer group.
Idahosa died on 12 March 1998. He was survived by his wife, Margaret Idahosa, and four children. His wife subsequently took over as the Archbishop of the Church of God Mission International (CGMI), the Christian ministry he founded, she is also the Chancellor of Benson Idahosa University