Disney Store Japan added a limited Frozen design to the digital membership card for premium Disney Store Club members Tuesday. Members can select the design through 11:59 p.m. Japan time on December 25.

The offer is limited to the Japanese premium membership program and its digital card.
When the limited period ends, members who selected the design will see their card automatically return to the standard Mickey design. The start date may change.
Source: Disney Store Japan’s premium member card announcement.
