Knowing what little I know about Japanese heraldry, I've designed a logo for Ichōnomiya High, Kaguya and Momoka's alma mater, in this style. This was hand-drawn with minor digital fixes and digital lettering, so not entirely symmetrical. I might remake the design later.

Drawn using pencil, gel ink pen and copic marker. The design features one ginkgo leaf, two gentian flowers and three momiji leaves inside a ring.

-Yuki, now considering drawing department flash patches in Japanese heraldry style