A patch has been released for Kingdon Hearts 3D: Dream Drop Distance in Japan.
The thing is, getting to the update is not as straight forward as you would think. Unlike the Mario Kart 7 update, you can either scan a QR code on the KH 3D Japan site and then follow the link to the eshop or by specifically searching for Kingdom Hearts in the eshop.
The patch, which was announced at the most recent Nintendo Direct and released on May 25 in Japan, updates the game to version 1.1 and fixes various bugs. Kingdom Hearts 3D: Dream Drop Distance releases in Europe on July 20 and in North America on July 31.
You can find the QR code for the update below.