At today's sentencing, Judge Mill said the amount of methamphetamine - which was linked to Manoharan through DNA testing - was considerable. He said Manoharan was not being used as a "simple drug mule" by his then-associate, whose name is currently suppressed, and that he intended to use most of the drugs for commercial purposes.
However, Judge Mill did acknowledge Manoharan was apologetic for what had happened.
A letter from Manoharan, which was read to the court by his lawyer Liz Hall, said he regretted his actions.
"It's been on my mind day and night four the last four years.
"I know I never should have done what I did and brought the drugs into New Zealand. I understand meth causes a lot of harm. I was not using my head and did not care about the consequences. I let the addiction and greed rule my life."
Manoharan's four-year sentence for the charge of importing methamphetamine is to be served on top of the prison sentence he is currently serving.