They are the first Irish citizens to test positive for COVID-19.
Two Irish citizens in Japan have tested positive for the coronavirus.
The two people, who are currently being treated in a Japanese hospital, were on board the Princess Diamond cruise ship.
The citizens in question share dual citizenship with another EU member state and are not normally resident in Ireland.
The Irish Embassy in Tokyo is in ongoing contact with them regarding their consular needs.
Six Irish citizens were on board the Princess Diamond Cruise Ship, while a further nine Irish citizens were passengers on the Westerdam Cruise Ship, two ships where the coronavirus has been detected.
The Department of Foreign Affairs also confirmed that two further Irish citizens who were passengers on the Westerdam returned to Ireland over the weekend.
An Tánaiste Simon Coveney said: "Two further Irish citizens, who were also passengers on the Westerdam, returned to Ireland over the weekend. The Health Service was informed. No further comment will be made about an individuals health or healthcare. To date, the Department of Health has confirmed there are no cases of COVID-19 in Ireland."
He added: "The safety and welfare of our citizens overseas remains our priority."
The Irish Government has allocated €500,000 to the World Health Organization to assist its vital work to help control the spread of the COVID-19.
