Sales of the 3D Marios in Japan:
1996 - Super Mario 64 - 1,646,558
2002 - Super Mario Sunshine - 789,989
2004 - Super Mario 64 DS - 1,231,891
2007 - Super Mario Galaxy - 1,025,664
2010 - Super Mario Galaxy 2 - 1,046,696
2011 - Super Mario 3D Land - 2,111,490
2013 - Super Mario 3D World - 742,024
Source: https://sites.google.com/site/gamedatalibrary/game-search
I think Mario Odyssey will pass 1 million sales and will outsell FFXV. 3D World flopped (in comparison to the other games) because it is on the Wii U.
I'm surprised that Mario Galaxy 2 sold as much as Mario Galaxy 1, I wish it had been the same in the rest of the world.
Edit: I changed the 3D World number to the more updated one.