Dang, that's even worse than mine
I'm sorry man. I thought about superglue too, but I tried it on an old M34 first and it works, but it's weird... it'll seal the crack, but if any glue is excess, it'll pool outside the skin and leave a hard, shiny appearance on the otherwise soft, matte skin. There is silicone glue for those sex dolls lol, but it's skin colored (very light skin, mind you) and it won't blend with Ryu well. Your best chance now is to contact Iconiq through email and see if they can help