Abe stopped in France Tuesday as part of his tour of Europe and North America.
Speaking alongside French president Emmanuel Macron, Abe said through a translator he "was deeply saddened by the damage inflicted to the World Heritage" building.
He said the Japanese government "will spare no effort to bring its cooperation" in the reconstruction.
Macron and Abe will discuss the agenda for the upcoming Group of Seven and Group of 20 leaders' summits that France and Japan will respectively host this year.
In their statement at the Elysee palace, they said they will also talk about boosting economic growth through free trade, and address issues including North Korea and plastic waste in ocean.
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