He was born on 16 February 1948.
Dr Agagu was the Deputy Governor of the state in the botched Third Republic, when he served with Evangelist Bamidele Olumilua.
When Nigeria returned to civil rule in 1999, Dr Agagu was appointed as the Minister for Aviation by former president Olusegun Obasanjo.
He was sworn in as the Governor of Ondo State on May 29, 2003, a position he held till February 2009 when the courts ruled that he did not win the 2007 governorship election held in the state.
The former Governor’s death was confirmed by Ayo Fadaka, the Publicity Secretary of the Peoples Democratic Party in Ondo State. He was 65.
He commenced his elementary education at St. Luke’s Anglican School, (now known as St. Paul’s Anglican School) Okitipupa, in 1954. In January 1958, he moved to live with his cousin, Edward Fagbohun in Ibadan, where he continued his primary education at Ebenezer African Church School, Oke-Ado, Ibadan.
In 1959 he transferred to Kano in 1959 where he studied at the Ebenezer Methodist School and Baptist Primary School Sabon-Gari, Kano. He then moved back to Ebenezer African Church School, Ibadan where he completed his primary education in 1960.
Thereafter, he was in Ibadan Grammar School between January 1961 and 1967 where he passed his West African School Certificate and the Higher School Certificate examinations. He was admitted to the University of Ibadan in 1968 to study Botany but later changed to Geology in which he graduated with a B.Sc. (Hons) degree in Second Class Upper Division, in 1971. As an undergraduate, his academic record was replete with laurels and prizes.
Agagu went to the University of Texas between 1973 and 1974 for his Masters degree in Geology. Returning to Nigeria, he obtained a Ph.D degree in Petroleum Geology from the University of Ibadan in 1978.