Joachim, the father of the Blessed Virgin Mary, is known only from the apocryphal gospel of James and nothing is mentioned in canonical scripture. There is no mention in either about the death of Joachim but one can surmise he probably died of complications of old age.
Saint Joaquim is not in the bible and we have no idea how he died. It was probably due to old age.
Joaquim Tenreiro died in 1992.
Joaquim Miranda died in 2006.
Joaquim Zamacois died in 1976.
Joaquim Fiúza died in 2010.
Joaquim Pimentel died in 2003.
Joaquim Vayreda died in 1894.
Joaquim Casimiro died in 1862.
Joaquim Costa died in 2008.
Joaquim Homs died in 2003.
Joaquim Guedes died in 2008.
Joaquim Nabuco died in 1910.