Further details around ship design, onboard experiences, delivery schedules and initial itineraries will be announced "in due course" with sales planned to open in 2027, according to the ultra-luxury cruise line.
It signed a Letter of Intent with Dutch shipbuilder Den Breejen Shipyard for the construction of its first luxury river ships.
A spokesperson for the line said: "Since launching, Explora Journeys has sought to change the way people experience ocean travel through its 'Ocean State of Mind' philosophy – combining the freedom and discovery of travelling by sea with the elegance and refinement of European hospitality and design. The brand now intends to bring that same approach to Europe’s most iconic rivers."
Explora Journeys launched its third ocean-going vessel this summer, with three more ships joining the fleet in 2027 and 2028.