Three of the featured girls that piqued my interest were S/mileage's Fukuda Kanon, Morning Musume. '14's Ikuta Erina, and Tokyo Girls' Style's Arai Hitomi.
I've edited the scans I for a more pleasant reading experience. In the process of editing the scans, I covered up part of the images. To make up for that, I'll be including the original scans I had so you can see those midriffs in their full glory. And aren't they scrumptious?
Please click on the pictures for larger versions.