Amazon Japan and Nintendo started a new special campaign with selected Nintendo 3DS and Wii U games. If you buy minimum 2 games from the selected ones (you can do mixed orders with 3DS and Wii U games in one package) you will get 1000 Yen OFF from the total price when you check out your order.
The campaign runs until January 14, 2017 and on the list you can find new and older games too. Few examples: Pokemon Sun & Moon, Momotarou Dentetsu 2017 Tachiagare Nippon!!, Splatoon, Super Mario Maker (3DS & Wii U ver too), Splatoon.