(Ondori) Pop Up Gift Cards by Masahiro Chatani.
Although Masahiro Chatani is the listed author of Pop Up Gift Cards, the book is divided pretty evenly among designs by Chatani, Keiko Nakazawa, Tamami Yamaguchi, and Etuko Motomura. More to love! (By the by, the card designs are unrelated to "gift cards", that is, store gift certificates. They are standard greeting cards.)