Around 400 CE, Hassan Yuha'min entered power as part of a co-regency with his father Abu Karib and his uncle Dhara' Amar Ayman.
[2] Around 433 CE, Hassan Yuha'min was mentioned in an inscription dating to that period alongside four other kings, Abu Karib, Sharhabil Ya'fur, Ma'dikarib and Marthad.
However, Abu al-Faraj al-Isfahani narrated that Hassan Yuha'min was very stubborn and immature, with an extremely oppressive rule which lead to his own assassination at the hands of his brother, Sharhabil Ya'fur.
[7] During his time as co-regent, Hassan Yuha'min and his father both participated in conquests throughout South Arabia in order to control the trade routes; including the land of the tribe of the Ma'adite Arabs in the region of Najd.
[8][9] Ibn Hisham, Tabari and Abu al-Faraj al-Isfahani related that Hassan Yuha'min had led the tribes of Yemen in a massive conquest to expand Himyarite rule to other countries.