He appeared at Auckland District Court via audio-visual link where his bail application was refused.
Tamaki will be remanded until January 27. He did not respond when Judge Evangelos Thomas handed down his decision.
He will likely be separated from other inmates for 14 days and routinely tested for Covid-19, along with all newly arrived prisoners at Mt Eden Corrections Facility.
He also won't be allowed face-to-face visits from family or friends, or his legal representation, while in custody.
In a statement through his lawyers, Tamaki said yesterday he will "defend what is alleged when permitted" on January 27.
"It is not accepted that he should have been remanded in custody and any longer period on remand will be challenged vigorously."
Tamaki believes in the "value of the rule of law" and is disappointed by those to "seek to silence him".
"It is a sad day for the freedom of all New Zealanders when people cannot gather and be heard in opposition to government policy when they believe it to be wrong and contrary to the good of the people," he said.
Tamaki said democracy has "taken another hit" and the New Zealand Bill of Rights Act has "lost any impact that those who drafted it dreamed it might have".
Tamaki is facing five active charges.
