The vote came as the ex-Soviet country sees its once-booming economy slump on the back of falling oil prices and an economic crisis in northern neighbour Russia, but Nazarbayev's grip on power appears as firm as ever.
The 75-year-old strongman -- who has ruled Kazakhstan virtually unopposed since before its independence from the Soviet Union in 1991 -- was elected to a new five-year term last year with 98 percent of the vote.
"This is Asia," he said. "We have different relationships -- family relationships, a different religion and different opportunities between people."
Polling stations closed across the vast country at 1500 GMT in a ballot featuring six parties mostly supportive of Nazarbayev.
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The Central Election Commission(CEC) claimed 75 percent of the electorate of nearly 10 million had cast votes by 1200 GMT today.
Standing in line to vote in Astana, Maral Akimbaeva, a 27-year-old worker for a state company, said she would "probably" vote for ruling party Nur Otan.