Gardaí and Revenue have displayed the herbal cannabis worth €37.5 million that was seized at Dublin Port yesterday.
The seizure is bigger than the total quantity of cannabis seized in the state in the past two years.
The discovery was the result of intelligence building and effective cooperation between the two agencies.
The drugs were discovered concealed in wide load containers which were labelled as containing machinery parts.
Garda assistant commissioner John O'Driscoll said: "We are all about trying to achieve results and this I believe in anyone's estimation is a great result."
A search yesterday resulted in the seizure of 1,873 kilos (4,129 lbs) of herbal cannabis.
It arrived at the port on a ship from Europe. The drugs were vacuum packed and concealed to avoid detention by X-rays and sniffer dogs.
Gardaí said investigations are continuing both locally and internationally, linked to the significant seizure of drugs destined for the Irish market.
The assistant commissioner added: "We are about trying to tackle organised crime in a significant manner. The business of organised crime will be impacted."
He listed a string of recent operations including the seizure of firearms from groups "intent on killing each other" in an apparent reference to recent gangland killings in the city.
Gardaí recently confiscated 18 cars in another blow against organised crime.
Mr O'Driscoll added: "All of these actions together combine to have a significant impact on organised crime."