In 1955, he enrolled at St. Pius Primary School, Mbazere, he completed his primary education at Christ the King's Awajir in 1961.
From 1966 - 1968, Governor Adasu studied at St. James Junior Seminary Keffi. He proceeded to St. Augustine's Major Seminary, Jos (an affiliate of Propoganda Fide University, Roma - Italy) in 1969 and graduated in 1972 with a Bachelor's degree in Divinity (B.D, CUM Laude).
Governor Adasu's quest for more knowledge took him to St. John's University New York, USA from 1975 - 1976 where he obtained a degree of Masters of Arts (M.A). He again went over to Catholic University of America, Washington DC, USA between 1976 - 1978 and obtained yet another degree of Masters of Religious Education (MRE).
Rev. Fr. Adasu's working career spans the religious and the secular spheres. He served as a Senior Inspector of Education at the Benue State Ministry of Education headquarters, Makurdi and also taught in various Secondary and Teachers Colleges in Jos, Otukpo and Adikpo. He also taught at the College of Education Akwanga and Katsina-Ala respectively.
He served on the Christian Pilgrims Welfare Board, Benue State Prerogative of Mercy, Advisory Council Episcopal Commission on African Tradition Religion and Board of Governors, College of Education, Katsina-Ala.
In the Church organization, he also held such responsible positions as Chairman, Presbyteral Council, Dean, Makurdi Deanery, Diocese of Makurdi and Vicar-General, Diocese of Makurdi.
He became the second Executive Governor of Benue State on January 2, 1992.