Taoiseach Leo Varadkar is to visit the Canadian border with the US tomorrow, to observe how it operates.
Mr Varadkar, who is on a three-day visit to Canada, has said he wants to see for himself whether or not it is an example of a soft border, as some people in favour of Brexit have claimed.
The Taoiseach has said he has been told that there are passport checks and customs checks, but if there is going to be a debate on the issue in the coming months it is an advantage to have seen some borders in operation.
Later, at a Tourism Ireland event, Mr Varadkar said he is absolutely convinced free movement of people north and south across the border without passports will not change post-Brexit.
He said trade borders still have to be negotiated but there is consensus in Dublin, London, Belfast and Brussels that passport-free travel will continue.
The Taoiseach earlier announced the Government is to double Ireland's global diplomatic and business agency representation between now and 2025.
Speaking at a business breakfast in Toronto, organised by the Ireland Canada Chamber of Commerce and Enterprise Ireland, the Fine Gael leader said he had already asked the Minister for Foreign Affairs to consider how this can be achieved.
Mr Varadkar said the work of what he calls 'Team Ireland' is central to ensuring a small country like Ireland can be considered an island at the centre of the world.
The new plan will be called Ireland's Global Footprint 2025.
Yesterday, the Taoiseach held discussions with Canadian Prime Minister Justin Trudeau.
