What kind of cards does the yomichan integration generate? If they are just simple cards, the export from anki → import apkg will probably be your best bet. My impression is that this kind of integration is not in the works, just a guess though.
I probably made it seem more complicated than it is because I wanted to highlight some of the different features. Actually the main reason why I like it and wanted to share was because making the cards is a lot easier.
You can just type what you want in that box, save then you’re done. It’s not much different than using a notes app. You’re also free to make every card different. Maybe some have 2 sides and others have 3 or 4, and some have pictures which you can just add by dragging the picture directly into that area.
You don’t have to set anything up before hand like in Anki. You could but you don’t have to.