Full list of Japanese eShop demos

Monster Hunter 3 Tri G
Puyo Puyo!! 20th Anniversary
Cooking Mama 4
Crayon Shin Chan: Uch? DE Ach?! Y?j?! no Baka Rate
Nicola Kansh? Model Oshare Audition
Hana to Ikimono no Rittai Zukan
Dead or Alive Dimensions

All of these demos expire after thirty plays. I don’t see the need for such a limit, but it is what it is!

Source