Tunku Abdul Rahman was appointed Tunku Mahkota of
Johor by his father, Sultan Ismail on 10 August 1961, after his brother, Tunku Iskandar (later Sultan Iskandar) was disinherited from the post on grounds of alleged misbehaviour. Five years later in December 1966, Tunku Iskandar was appointed as the Raja Muda at the request of their father, Sultan Ismail and was approved by the Council of Royal Court, and placing him second in line to the royal throne behind Tunku Abdul Rahman. On 29 April 1981, as Sultan Ismail lay ill on his deathbed, Tunku Iskandar was appointed Tunku Mahkota in favour of him. The decision took many people by surprise, including the then-
Menteri Besar of Johor,
Othman Saat who promptly criticised the Sultan's actions, and earning the wrath of Tunku Iskandar at the same time. ==Later life==