Stone

Horimiya, Dressup Darling, Yakuza Fiancee, Ranma are not shoujo. The only anime/manga that you listed that are actually shoujo are Fruits Basket, Honey Lemon Soda and Kimi no Todoke. What is the difference? The target audience. The monthly serialization the manga are in determine their genre. Yakuza Fiancee is a great romance manga, but the manga magazine it is published in is targeted for young men. This makes the genre a Seinen manga. A lot of popular romance manga right now are actually not shoujo but shounen/seinen because of the magazine they are published in. Honey Lemon Soda is a shoujo because it is published in a girls magazine with a target audience of girls 5-12. Hope this helps!!