FamilyMart Hatsune Miku Onigiri

As part of their Hatsune Miku promotion same of the food items such as these onigiri (rice ball) offerings have the character on the label. One of these is a zangi fried chicken and mayo musubi onigiri and the other is a tuna and mayo onigiri.

http://www.family.co.jp/goods/thisweek/kanto_01.html

Link with good photos
http://gigazine.net/news/20120813-hatsune-yakisoba/  

Photo is a web capture for explanatory purposes, copyright belongs to the company.