Well I'm calling this a half cake for Riho. Fukuchan posted that Riho and Rikako shared a birthday (which I didn't know) so they celebrated both together. I think this has taught me that actually H!P is pretty stingy on birthday cakes. It is usually idol appearances on tv/radio where they receive all those extra cakes. :) Riho has been quite busy with Lilium rehearsals so she hasn't made many appearances this year.