h ā r ā jak ā y ika ▁( ; ▁) ▁heaven ▁is ▁the ▁first ▁world ▁of ▁the ▁dev as ▁in ▁Buddh ist ▁cosm ology . ▁The ▁word ▁C ā t ur ma h ā r ā jak ā y ika ▁refers ▁to ▁the ▁Four ▁Heaven ly ▁Kings ▁( C ā t ur ma h ā r ā ja ) ▁who ▁rule ▁over ▁this ▁world ▁along ▁with ▁the ▁assemb lage ▁or ▁mult itude ▁( k ā y ika ) ▁of ▁be ings ▁that ▁dwell ▁there . ▁▁ ▁The ▁be ings ▁themselves ▁are ▁generally ▁called ▁c ā t ur ma h ā r ā jak ā y ik ā s ▁or ▁c ā t ur ma h ā r ā jak ā y ika ▁dev as . ▁ ▁Description ▁The ▁Ch ā t ur ma h ā r ā jak ā y ika ▁heaven ▁is ▁the ▁first ▁of ▁the ▁heaven ▁of ▁the ▁K ā mad h ā tu ▁and ▁the ▁lowest ▁of ▁the ▁heav ens ▁that ▁maintain s ▁a ▁physical ▁connection ▁with ▁the ▁human ▁world . ▁It ▁is ▁located ▁on ▁the ▁s lop es ▁of ▁Mount ▁S umer u , ▁though ▁some ▁of ▁the ▁dev as ▁there ▁dwell ▁inside ▁the ▁mountain ▁and ▁in ▁the ▁sky ▁surrounding ▁it . ▁ ▁The ▁most ▁notable ▁residents ▁of ▁this ▁world ▁are ▁the ▁Four ▁Heaven ly ▁Kings ▁who ▁serve ▁Ś ak ra ▁of ▁the ▁higher ▁heaven ▁Tr ā y ast ri ṃ ś a , ▁and ▁govern ▁the ▁four ▁cardinal ▁directions . ▁They ▁are ▁also ▁leaders ▁of ▁various ▁races